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Finding the Fourth Proportional to 86,159.49, 129,239.29 and 26,999.79

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Solution

The fourth proportional to 86,159.49, 129,239.29 and 26,999.79 is: 40,499.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,159.49 : 129,239.29 = 26,999.79 : x
  2. Step 2: Convert to fraction form
    86,159.49/129,239.29 = 26,999.79/x
  3. Step 3: Cross multiply
    86,159.49x = 129,239.29 × 26,999.79
  4. Step 4: Simplify right side
    86,159.49x = 3,489,434,106.90
  5. Step 5: Solve for x
    x = 3,489,434,106.90/86,159.49
  6. Step 6: Final answer
    x = 40,499.71

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.