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Finding the Fourth Proportional to 71,499.99, 98,681.76 and 39,679.14

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Solution

The fourth proportional to 71,499.99, 98,681.76 and 39,679.14 is: 54,763.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,499.99 : 98,681.76 = 39,679.14 : x
  2. Step 2: Convert to fraction form
    71,499.99/98,681.76 = 39,679.14/x
  3. Step 3: Cross multiply
    71,499.99x = 98,681.76 × 39,679.14
  4. Step 4: Simplify right side
    71,499.99x = 3,915,607,370.49
  5. Step 5: Solve for x
    x = 3,915,607,370.49/71,499.99
  6. Step 6: Final answer
    x = 54,763.75

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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.