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Finding the Fourth Proportional to 138,801.40, 208,250.70 and 59,972.20

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Solution

The fourth proportional to 138,801.40, 208,250.70 and 59,972.20 is: 89,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,801.40 : 208,250.70 = 59,972.20 : x
  2. Step 2: Convert to fraction form
    138,801.40/208,250.70 = 59,972.20/x
  3. Step 3: Cross multiply
    138,801.40x = 208,250.70 × 59,972.20
  4. Step 4: Simplify right side
    138,801.40x = 12,489,252,630.54
  5. Step 5: Solve for x
    x = 12,489,252,630.54/138,801.40
  6. Step 6: Final answer
    x = 89,979.30

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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.