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Finding the Fourth Proportional to 138,404.85, 207,115.20 and 96,086.40

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Solution

The fourth proportional to 138,404.85, 207,115.20 and 96,086.40 is: 143,787.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,404.85 : 207,115.20 = 96,086.40 : x
  2. Step 2: Convert to fraction form
    138,404.85/207,115.20 = 96,086.40/x
  3. Step 3: Cross multiply
    138,404.85x = 207,115.20 × 96,086.40
  4. Step 4: Simplify right side
    138,404.85x = 19,900,953,953.28
  5. Step 5: Solve for x
    x = 19,900,953,953.28/138,404.85
  6. Step 6: Final answer
    x = 143,787.98

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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.