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Finding the Fourth Proportional to 99,539.92, 137,361 and 54,217

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Solution

The fourth proportional to 99,539.92, 137,361 and 54,217 is: 74,817.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,539.92 : 137,361 = 54,217 : x
  2. Step 2: Convert to fraction form
    99,539.92/137,361 = 54,217/x
  3. Step 3: Cross multiply
    99,539.92x = 137,361 × 54,217
  4. Step 4: Simplify right side
    99,539.92x = 7,447,301,337
  5. Step 5: Solve for x
    x = 7,447,301,337/99,539.92
  6. Step 6: Final answer
    x = 74,817.23

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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.