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Finding the Fourth Proportional to 139,691.98, 192,774.92 and 76,030.23

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Solution

The fourth proportional to 139,691.98, 192,774.92 and 76,030.23 is: 104,921.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,691.98 : 192,774.92 = 76,030.23 : x
  2. Step 2: Convert to fraction form
    139,691.98/192,774.92 = 76,030.23/x
  3. Step 3: Cross multiply
    139,691.98x = 192,774.92 × 76,030.23
  4. Step 4: Simplify right side
    139,691.98x = 14,656,721,505.83
  5. Step 5: Solve for x
    x = 14,656,721,505.83/139,691.98
  6. Step 6: Final answer
    x = 104,921.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.