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Finding the Fourth Proportional to 136,590.71, 204,499.68 and 72,402.59

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Solution

The fourth proportional to 136,590.71, 204,499.68 and 72,402.59 is: 108,399.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,590.71 : 204,499.68 = 72,402.59 : x
  2. Step 2: Convert to fraction form
    136,590.71/204,499.68 = 72,402.59/x
  3. Step 3: Cross multiply
    136,590.71x = 204,499.68 × 72,402.59
  4. Step 4: Simplify right side
    136,590.71x = 14,806,306,486.17
  5. Step 5: Solve for x
    x = 14,806,306,486.17/136,590.71
  6. Step 6: Final answer
    x = 108,399.08

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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.