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Finding the Fourth Proportional to 86,658.49, 129,987.38 and 27,498.77

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Solution

The fourth proportional to 86,658.49, 129,987.38 and 27,498.77 is: 41,248.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,658.49 : 129,987.38 = 27,498.77 : x
  2. Step 2: Convert to fraction form
    86,658.49/129,987.38 = 27,498.77/x
  3. Step 3: Cross multiply
    86,658.49x = 129,987.38 × 27,498.77
  4. Step 4: Simplify right side
    86,658.49x = 3,574,492,415.59
  5. Step 5: Solve for x
    x = 3,574,492,415.59/86,658.49
  6. Step 6: Final answer
    x = 41,248.04

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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.