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Finding the Fourth Proportional to 363,747.60, 545,719.95 and 138,989.61

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Solution

The fourth proportional to 363,747.60, 545,719.95 and 138,989.61 is: 208,522.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,747.60 : 545,719.95 = 138,989.61 : x
  2. Step 2: Convert to fraction form
    363,747.60/545,719.95 = 138,989.61/x
  3. Step 3: Cross multiply
    363,747.60x = 545,719.95 × 138,989.61
  4. Step 4: Simplify right side
    363,747.60x = 75,849,403,019.72
  5. Step 5: Solve for x
    x = 75,849,403,019.72/363,747.60
  6. Step 6: Final answer
    x = 208,522.07

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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.