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Finding the Fourth Proportional to 114,992.53, 158,553.92 and 78,711.48

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Solution

The fourth proportional to 114,992.53, 158,553.92 and 78,711.48 is: 108,528.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,992.53 : 158,553.92 = 78,711.48 : x
  2. Step 2: Convert to fraction form
    114,992.53/158,553.92 = 78,711.48/x
  3. Step 3: Cross multiply
    114,992.53x = 158,553.92 × 78,711.48
  4. Step 4: Simplify right side
    114,992.53x = 12,480,013,899.78
  5. Step 5: Solve for x
    x = 12,480,013,899.78/114,992.53
  6. Step 6: Final answer
    x = 108,528.91

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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.