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Finding the Fourth Proportional to 138,797.50, 191,541.13 and 75,135.30

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Solution

The fourth proportional to 138,797.50, 191,541.13 and 75,135.30 is: 103,687.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,797.50 : 191,541.13 = 75,135.30 : x
  2. Step 2: Convert to fraction form
    138,797.50/191,541.13 = 75,135.30/x
  3. Step 3: Cross multiply
    138,797.50x = 191,541.13 × 75,135.30
  4. Step 4: Simplify right side
    138,797.50x = 14,391,499,570.09
  5. Step 5: Solve for x
    x = 14,391,499,570.09/138,797.50
  6. Step 6: Final answer
    x = 103,687.02

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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.