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Finding the Fourth Proportional to 88,177, 121,685.16 and 47,891.55

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Solution

The fourth proportional to 88,177, 121,685.16 and 47,891.55 is: 66,090.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,177 : 121,685.16 = 47,891.55 : x
  2. Step 2: Convert to fraction form
    88,177/121,685.16 = 47,891.55/x
  3. Step 3: Cross multiply
    88,177x = 121,685.16 × 47,891.55
  4. Step 4: Simplify right side
    88,177x = 5,827,690,684.94
  5. Step 5: Solve for x
    x = 5,827,690,684.94/88,177
  6. Step 6: Final answer
    x = 66,090.83

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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.