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Finding the Fourth Proportional to 71,681.72, 98,912.14 and 39,846.52

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Solution

The fourth proportional to 71,681.72, 98,912.14 and 39,846.52 is: 54,983.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,681.72 : 98,912.14 = 39,846.52 : x
  2. Step 2: Convert to fraction form
    71,681.72/98,912.14 = 39,846.52/x
  3. Step 3: Cross multiply
    71,681.72x = 98,912.14 × 39,846.52
  4. Step 4: Simplify right side
    71,681.72x = 3,941,304,564.75
  5. Step 5: Solve for x
    x = 3,941,304,564.75/71,681.72
  6. Step 6: Final answer
    x = 54,983.40

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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.