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Finding the Fourth Proportional to 138,545.92, 207,801.60 and 55,440.64

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Solution

The fourth proportional to 138,545.92, 207,801.60 and 55,440.64 is: 83,154.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,545.92 : 207,801.60 = 55,440.64 : x
  2. Step 2: Convert to fraction form
    138,545.92/207,801.60 = 55,440.64/x
  3. Step 3: Cross multiply
    138,545.92x = 207,801.60 × 55,440.64
  4. Step 4: Simplify right side
    138,545.92x = 11,520,653,697.02
  5. Step 5: Solve for x
    x = 11,520,653,697.02/138,545.92
  6. Step 6: Final answer
    x = 83,154.05

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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.