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Finding the Fourth Proportional to 74,618.47, 111,932.07 and 21,306.34

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Solution

The fourth proportional to 74,618.47, 111,932.07 and 21,306.34 is: 31,960.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,618.47 : 111,932.07 = 21,306.34 : x
  2. Step 2: Convert to fraction form
    74,618.47/111,932.07 = 21,306.34/x
  3. Step 3: Cross multiply
    74,618.47x = 111,932.07 × 21,306.34
  4. Step 4: Simplify right side
    74,618.47x = 2,384,862,740.32
  5. Step 5: Solve for x
    x = 2,384,862,740.32/74,618.47
  6. Step 6: Final answer
    x = 31,960.76

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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.