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Finding the Fourth Proportional to 87,679.98, 121,001.14 and 49,956.66

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Solution

The fourth proportional to 87,679.98, 121,001.14 and 49,956.66 is: 68,941.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,679.98 : 121,001.14 = 49,956.66 : x
  2. Step 2: Convert to fraction form
    87,679.98/121,001.14 = 49,956.66/x
  3. Step 3: Cross multiply
    87,679.98x = 121,001.14 × 49,956.66
  4. Step 4: Simplify right side
    87,679.98x = 6,044,812,810.59
  5. Step 5: Solve for x
    x = 6,044,812,810.59/87,679.98
  6. Step 6: Final answer
    x = 68,941.77

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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.