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Finding the Fourth Proportional to 139,771.68, 209,691.03 and 45,010.79

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Solution

The fourth proportional to 139,771.68, 209,691.03 and 45,010.79 is: 67,526.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,771.68 : 209,691.03 = 45,010.79 : x
  2. Step 2: Convert to fraction form
    139,771.68/209,691.03 = 45,010.79/x
  3. Step 3: Cross multiply
    139,771.68x = 209,691.03 × 45,010.79
  4. Step 4: Simplify right side
    139,771.68x = 9,438,358,569.70
  5. Step 5: Solve for x
    x = 9,438,358,569.70/139,771.68
  6. Step 6: Final answer
    x = 67,526.98

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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.