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Finding the Fourth Proportional to 102,674.78, 141,691.69 and 57,354.67

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Solution

The fourth proportional to 102,674.78, 141,691.69 and 57,354.67 is: 79,149.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,674.78 : 141,691.69 = 57,354.67 : x
  2. Step 2: Convert to fraction form
    102,674.78/141,691.69 = 57,354.67/x
  3. Step 3: Cross multiply
    102,674.78x = 141,691.69 × 57,354.67
  4. Step 4: Simplify right side
    102,674.78x = 8,126,680,121.69
  5. Step 5: Solve for x
    x = 8,126,680,121.69/102,674.78
  6. Step 6: Final answer
    x = 79,149.72

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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.