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Finding the Fourth Proportional to 123,902.54, 170,979.98 and 70,186.47

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Solution

The fourth proportional to 123,902.54, 170,979.98 and 70,186.47 is: 96,854.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,902.54 : 170,979.98 = 70,186.47 : x
  2. Step 2: Convert to fraction form
    123,902.54/170,979.98 = 70,186.47/x
  3. Step 3: Cross multiply
    123,902.54x = 170,979.98 × 70,186.47
  4. Step 4: Simplify right side
    123,902.54x = 12,000,481,236.87
  5. Step 5: Solve for x
    x = 12,000,481,236.87/123,902.54
  6. Step 6: Final answer
    x = 96,854.20

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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.