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Finding the Fourth Proportional to 97,721.80, 146,906.70 and 84,891.40

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Solution

The fourth proportional to 97,721.80, 146,906.70 and 84,891.40 is: 127,618.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,721.80 : 146,906.70 = 84,891.40 : x
  2. Step 2: Convert to fraction form
    97,721.80/146,906.70 = 84,891.40/x
  3. Step 3: Cross multiply
    97,721.80x = 146,906.70 × 84,891.40
  4. Step 4: Simplify right side
    97,721.80x = 12,471,115,432.38
  5. Step 5: Solve for x
    x = 12,471,115,432.38/97,721.80
  6. Step 6: Final answer
    x = 127,618.56

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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.