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Finding the Fourth Proportional to 71,325.74, 98,428.31 and 39,493.95

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Solution

The fourth proportional to 71,325.74, 98,428.31 and 39,493.95 is: 54,500.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,325.74 : 98,428.31 = 39,493.95 : x
  2. Step 2: Convert to fraction form
    71,325.74/98,428.31 = 39,493.95/x
  3. Step 3: Cross multiply
    71,325.74x = 98,428.31 × 39,493.95
  4. Step 4: Simplify right side
    71,325.74x = 3,887,322,852.46
  5. Step 5: Solve for x
    x = 3,887,322,852.46/71,325.74
  6. Step 6: Final answer
    x = 54,500.99

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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.