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Finding the Fourth Proportional to 124,426.92, 171,723.98 and 78,553.22

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Solution

The fourth proportional to 124,426.92, 171,723.98 and 78,553.22 is: 108,412.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,426.92 : 171,723.98 = 78,553.22 : x
  2. Step 2: Convert to fraction form
    124,426.92/171,723.98 = 78,553.22/x
  3. Step 3: Cross multiply
    124,426.92x = 171,723.98 × 78,553.22
  4. Step 4: Simplify right side
    124,426.92x = 13,489,471,187.45
  5. Step 5: Solve for x
    x = 13,489,471,187.45/124,426.92
  6. Step 6: Final answer
    x = 108,412.80

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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.