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Finding the Fourth Proportional to 139,379.52, 192,337.57 and 78,948.95

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Solution

The fourth proportional to 139,379.52, 192,337.57 and 78,948.95 is: 108,946.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,379.52 : 192,337.57 = 78,948.95 : x
  2. Step 2: Convert to fraction form
    139,379.52/192,337.57 = 78,948.95/x
  3. Step 3: Cross multiply
    139,379.52x = 192,337.57 × 78,948.95
  4. Step 4: Simplify right side
    139,379.52x = 15,184,849,197.05
  5. Step 5: Solve for x
    x = 15,184,849,197.05/139,379.52
  6. Step 6: Final answer
    x = 108,946.06

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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.