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Finding the Fourth Proportional to 172,045.20, 257,949.90 and 87,641.94

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Solution

The fourth proportional to 172,045.20, 257,949.90 and 87,641.94 is: 131,402.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,045.20 : 257,949.90 = 87,641.94 : x
  2. Step 2: Convert to fraction form
    172,045.20/257,949.90 = 87,641.94/x
  3. Step 3: Cross multiply
    172,045.20x = 257,949.90 × 87,641.94
  4. Step 4: Simplify right side
    172,045.20x = 22,607,229,658.81
  5. Step 5: Solve for x
    x = 22,607,229,658.81/172,045.20
  6. Step 6: Final answer
    x = 131,402.85

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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.