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Finding the Fourth Proportional to 138,461.60, 207,789.60 and 59,632.40

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Solution

The fourth proportional to 138,461.60, 207,789.60 and 59,632.40 is: 89,490.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,461.60 : 207,789.60 = 59,632.40 : x
  2. Step 2: Convert to fraction form
    138,461.60/207,789.60 = 59,632.40/x
  3. Step 3: Cross multiply
    138,461.60x = 207,789.60 × 59,632.40
  4. Step 4: Simplify right side
    138,461.60x = 12,390,992,543.04
  5. Step 5: Solve for x
    x = 12,390,992,543.04/138,461.60
  6. Step 6: Final answer
    x = 89,490.46

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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.