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Finding the Fourth Proportional to 139,730.68, 192,854.90 and 79,306.98

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Solution

The fourth proportional to 139,730.68, 192,854.90 and 79,306.98 is: 109,458.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,730.68 : 192,854.90 = 79,306.98 : x
  2. Step 2: Convert to fraction form
    139,730.68/192,854.90 = 79,306.98/x
  3. Step 3: Cross multiply
    139,730.68x = 192,854.90 × 79,306.98
  4. Step 4: Simplify right side
    139,730.68x = 15,294,739,697.20
  5. Step 5: Solve for x
    x = 15,294,739,697.20/139,730.68
  6. Step 6: Final answer
    x = 109,458.71

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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.