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Finding the Fourth Proportional to 87,854.38, 121,239.28 and 47,568.64

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Solution

The fourth proportional to 87,854.38, 121,239.28 and 47,568.64 is: 65,644.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,854.38 : 121,239.28 = 47,568.64 : x
  2. Step 2: Convert to fraction form
    87,854.38/121,239.28 = 47,568.64/x
  3. Step 3: Cross multiply
    87,854.38x = 121,239.28 × 47,568.64
  4. Step 4: Simplify right side
    87,854.38x = 5,767,187,664.18
  5. Step 5: Solve for x
    x = 5,767,187,664.18/87,854.38
  6. Step 6: Final answer
    x = 65,644.85

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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.