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Finding the Fourth Proportional to 87,960, 121,384.12 and 47,672.73

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Solution

The fourth proportional to 87,960, 121,384.12 and 47,672.73 is: 65,788.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,960 : 121,384.12 = 47,672.73 : x
  2. Step 2: Convert to fraction form
    87,960/121,384.12 = 47,672.73/x
  3. Step 3: Cross multiply
    87,960x = 121,384.12 × 47,672.73
  4. Step 4: Simplify right side
    87,960x = 5,786,712,259.87
  5. Step 5: Solve for x
    x = 5,786,712,259.87/87,960
  6. Step 6: Final answer
    x = 65,788.00

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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.