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Finding the Fourth Proportional to 153,998.59, 212,515.80 and 86,016.55

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Solution

The fourth proportional to 153,998.59, 212,515.80 and 86,016.55 is: 118,701.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,998.59 : 212,515.80 = 86,016.55 : x
  2. Step 2: Convert to fraction form
    153,998.59/212,515.80 = 86,016.55/x
  3. Step 3: Cross multiply
    153,998.59x = 212,515.80 × 86,016.55
  4. Step 4: Simplify right side
    153,998.59x = 18,279,875,964.95
  5. Step 5: Solve for x
    x = 18,279,875,964.95/153,998.59
  6. Step 6: Final answer
    x = 118,701.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.