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Finding the Fourth Proportional to 62,304, 85,979.60 and 39,948

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Solution

The fourth proportional to 62,304, 85,979.60 and 39,948 is: 55,128.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,304 : 85,979.60 = 39,948 : x
  2. Step 2: Convert to fraction form
    62,304/85,979.60 = 39,948/x
  3. Step 3: Cross multiply
    62,304x = 85,979.60 × 39,948
  4. Step 4: Simplify right side
    62,304x = 3,434,713,060.80
  5. Step 5: Solve for x
    x = 3,434,713,060.80/62,304
  6. Step 6: Final answer
    x = 55,128.29

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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.