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Finding the Fourth Proportional to 87,706.79, 121,044.75 and 53,737.82

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Solution

The fourth proportional to 87,706.79, 121,044.75 and 53,737.82 is: 74,163.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,706.79 : 121,044.75 = 53,737.82 : x
  2. Step 2: Convert to fraction form
    87,706.79/121,044.75 = 53,737.82/x
  3. Step 3: Cross multiply
    87,706.79x = 121,044.75 × 53,737.82
  4. Step 4: Simplify right side
    87,706.79x = 6,504,680,987.45
  5. Step 5: Solve for x
    x = 6,504,680,987.45/87,706.79
  6. Step 6: Final answer
    x = 74,163.94

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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.