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Finding the Fourth Proportional to 87,866.74, 121,255.90 and 47,580.61

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Solution

The fourth proportional to 87,866.74, 121,255.90 and 47,580.61 is: 65,661.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,866.74 : 121,255.90 = 47,580.61 : x
  2. Step 2: Convert to fraction form
    87,866.74/121,255.90 = 47,580.61/x
  3. Step 3: Cross multiply
    87,866.74x = 121,255.90 × 47,580.61
  4. Step 4: Simplify right side
    87,866.74x = 5,769,429,688.10
  5. Step 5: Solve for x
    x = 5,769,429,688.10/87,866.74
  6. Step 6: Final answer
    x = 65,661.13

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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.