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Finding the Fourth Proportional to 139,668.86, 192,737.32 and 76,006.70

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Solution

The fourth proportional to 139,668.86, 192,737.32 and 76,006.70 is: 104,886.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,668.86 : 192,737.32 = 76,006.70 : x
  2. Step 2: Convert to fraction form
    139,668.86/192,737.32 = 76,006.70/x
  3. Step 3: Cross multiply
    139,668.86x = 192,737.32 × 76,006.70
  4. Step 4: Simplify right side
    139,668.86x = 14,649,327,660.04
  5. Step 5: Solve for x
    x = 14,649,327,660.04/139,668.86
  6. Step 6: Final answer
    x = 104,886.14

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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.