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Finding the Fourth Proportional to 129,767.28, 178,813.04 and 95,721.80

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Solution

The fourth proportional to 129,767.28, 178,813.04 and 95,721.80 is: 131,900.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,767.28 : 178,813.04 = 95,721.80 : x
  2. Step 2: Convert to fraction form
    129,767.28/178,813.04 = 95,721.80/x
  3. Step 3: Cross multiply
    129,767.28x = 178,813.04 × 95,721.80
  4. Step 4: Simplify right side
    129,767.28x = 17,116,306,052.27
  5. Step 5: Solve for x
    x = 17,116,306,052.27/129,767.28
  6. Step 6: Final answer
    x = 131,900.01

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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.