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Finding the Fourth Proportional to 87,641.40, 131,310.90 and 40,798.20

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Solution

The fourth proportional to 87,641.40, 131,310.90 and 40,798.20 is: 61,126.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,641.40 : 131,310.90 = 40,798.20 : x
  2. Step 2: Convert to fraction form
    87,641.40/131,310.90 = 40,798.20/x
  3. Step 3: Cross multiply
    87,641.40x = 131,310.90 × 40,798.20
  4. Step 4: Simplify right side
    87,641.40x = 5,357,248,360.38
  5. Step 5: Solve for x
    x = 5,357,248,360.38/87,641.40
  6. Step 6: Final answer
    x = 61,126.91

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1.5x scale

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.