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Finding the Fourth Proportional to 66,304.72, 91,470.28 and 39,431.96

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Solution

The fourth proportional to 66,304.72, 91,470.28 and 39,431.96 is: 54,398.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,304.72 : 91,470.28 = 39,431.96 : x
  2. Step 2: Convert to fraction form
    66,304.72/91,470.28 = 39,431.96/x
  3. Step 3: Cross multiply
    66,304.72x = 91,470.28 × 39,431.96
  4. Step 4: Simplify right side
    66,304.72x = 3,606,852,422.15
  5. Step 5: Solve for x
    x = 3,606,852,422.15/66,304.72
  6. Step 6: Final answer
    x = 54,398.12

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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.