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Finding the Fourth Proportional to 91,900.87, 137,859 and 25,340.95

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Solution

The fourth proportional to 91,900.87, 137,859 and 25,340.95 is: 38,013.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,900.87 : 137,859 = 25,340.95 : x
  2. Step 2: Convert to fraction form
    91,900.87/137,859 = 25,340.95/x
  3. Step 3: Cross multiply
    91,900.87x = 137,859 × 25,340.95
  4. Step 4: Simplify right side
    91,900.87x = 3,493,478,026.05
  5. Step 5: Solve for x
    x = 3,493,478,026.05/91,900.87
  6. Step 6: Final answer
    x = 38,013.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.