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Finding the Fourth Proportional to 87,902.58, 121,275.72 and 49,656.54

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Solution

The fourth proportional to 87,902.58, 121,275.72 and 49,656.54 is: 68,509.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,902.58 : 121,275.72 = 49,656.54 : x
  2. Step 2: Convert to fraction form
    87,902.58/121,275.72 = 49,656.54/x
  3. Step 3: Cross multiply
    87,902.58x = 121,275.72 × 49,656.54
  4. Step 4: Simplify right side
    87,902.58x = 6,022,132,641.21
  5. Step 5: Solve for x
    x = 6,022,132,641.21/87,902.58
  6. Step 6: Final answer
    x = 68,509.17

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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.