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Finding the Fourth Proportional to 129,624.52, 178,728.80 and 88,808.22

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Solution

The fourth proportional to 129,624.52, 178,728.80 and 88,808.22 is: 122,450.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,624.52 : 178,728.80 = 88,808.22 : x
  2. Step 2: Convert to fraction form
    129,624.52/178,728.80 = 88,808.22/x
  3. Step 3: Cross multiply
    129,624.52x = 178,728.80 × 88,808.22
  4. Step 4: Simplify right side
    129,624.52x = 15,872,586,590.74
  5. Step 5: Solve for x
    x = 15,872,586,590.74/129,624.52
  6. Step 6: Final answer
    x = 122,450.49

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1.5x scale

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.