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Finding the Fourth Proportional to 87,693.62, 121,017.01 and 49,967.86

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Solution

The fourth proportional to 87,693.62, 121,017.01 and 49,967.86 is: 68,955.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,693.62 : 121,017.01 = 49,967.86 : x
  2. Step 2: Convert to fraction form
    87,693.62/121,017.01 = 49,967.86/x
  3. Step 3: Cross multiply
    87,693.62x = 121,017.01 × 49,967.86
  4. Step 4: Simplify right side
    87,693.62x = 6,046,961,013.30
  5. Step 5: Solve for x
    x = 6,046,961,013.30/87,693.62
  6. Step 6: Final answer
    x = 68,955.54

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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.