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Finding the Fourth Proportional to 119,377.76, 178,624.88 and 72,020.28

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Solution

The fourth proportional to 119,377.76, 178,624.88 and 72,020.28 is: 107,763.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,377.76 : 178,624.88 = 72,020.28 : x
  2. Step 2: Convert to fraction form
    119,377.76/178,624.88 = 72,020.28/x
  3. Step 3: Cross multiply
    119,377.76x = 178,624.88 × 72,020.28
  4. Step 4: Simplify right side
    119,377.76x = 12,864,613,872.57
  5. Step 5: Solve for x
    x = 12,864,613,872.57/119,377.76
  6. Step 6: Final answer
    x = 107,763.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.