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Finding the Fourth Proportional to 125,353.99, 172,862.53 and 75,082.15

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Solution

The fourth proportional to 125,353.99, 172,862.53 and 75,082.15 is: 103,537.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,353.99 : 172,862.53 = 75,082.15 : x
  2. Step 2: Convert to fraction form
    125,353.99/172,862.53 = 75,082.15/x
  3. Step 3: Cross multiply
    125,353.99x = 172,862.53 × 75,082.15
  4. Step 4: Simplify right side
    125,353.99x = 12,978,890,406.84
  5. Step 5: Solve for x
    x = 12,978,890,406.84/125,353.99
  6. Step 6: Final answer
    x = 103,537.91

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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.