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Finding the Fourth Proportional to 91,912.65, 126,836.17 and 56,162.49

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Solution

The fourth proportional to 91,912.65, 126,836.17 and 56,162.49 is: 77,502.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,912.65 : 126,836.17 = 56,162.49 : x
  2. Step 2: Convert to fraction form
    91,912.65/126,836.17 = 56,162.49/x
  3. Step 3: Cross multiply
    91,912.65x = 126,836.17 × 56,162.49
  4. Step 4: Simplify right side
    91,912.65x = 7,123,435,129.26
  5. Step 5: Solve for x
    x = 7,123,435,129.26/91,912.65
  6. Step 6: Final answer
    x = 77,502.23

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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.