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Finding the Fourth Proportional to 91,911.65, 126,834.80 and 56,161.49

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Solution

The fourth proportional to 91,911.65, 126,834.80 and 56,161.49 is: 77,500.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,911.65 : 126,834.80 = 56,161.49 : x
  2. Step 2: Convert to fraction form
    91,911.65/126,834.80 = 56,161.49/x
  3. Step 3: Cross multiply
    91,911.65x = 126,834.80 × 56,161.49
  4. Step 4: Simplify right side
    91,911.65x = 7,123,230,436.87
  5. Step 5: Solve for x
    x = 7,123,230,436.87/91,911.65
  6. Step 6: Final answer
    x = 77,500.85

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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.