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Finding the Fourth Proportional to 91,119.62, 136,680.65 and 31,957.02

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Solution

The fourth proportional to 91,119.62, 136,680.65 and 31,957.02 is: 47,935.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,119.62 : 136,680.65 = 31,957.02 : x
  2. Step 2: Convert to fraction form
    91,119.62/136,680.65 = 31,957.02/x
  3. Step 3: Cross multiply
    91,119.62x = 136,680.65 × 31,957.02
  4. Step 4: Simplify right side
    91,119.62x = 4,367,906,225.72
  5. Step 5: Solve for x
    x = 4,367,906,225.72/91,119.62
  6. Step 6: Final answer
    x = 47,935.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.