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Finding the Fourth Proportional to 71,605.62, 98,487.09 and 57,427.38

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Solution

The fourth proportional to 71,605.62, 98,487.09 and 57,427.38 is: 78,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,605.62 : 98,487.09 = 57,427.38 : x
  2. Step 2: Convert to fraction form
    71,605.62/98,487.09 = 57,427.38/x
  3. Step 3: Cross multiply
    71,605.62x = 98,487.09 × 57,427.38
  4. Step 4: Simplify right side
    71,605.62x = 5,655,855,542.52
  5. Step 5: Solve for x
    x = 5,655,855,542.52/71,605.62
  6. Step 6: Final answer
    x = 78,986.20

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1.5x scale

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.