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Finding the Fourth Proportional to 138,404.52, 207,606.90 and 99,038.52

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Solution

The fourth proportional to 138,404.52, 207,606.90 and 99,038.52 is: 148,557.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,404.52 : 207,606.90 = 99,038.52 : x
  2. Step 2: Convert to fraction form
    138,404.52/207,606.90 = 99,038.52/x
  3. Step 3: Cross multiply
    138,404.52x = 207,606.90 × 99,038.52
  4. Step 4: Simplify right side
    138,404.52x = 20,561,080,117.79
  5. Step 5: Solve for x
    x = 20,561,080,117.79/138,404.52
  6. Step 6: Final answer
    x = 148,557.87

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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.