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Finding the Fourth Proportional to 94,131, 129,912.30 and 54,387

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Solution

The fourth proportional to 94,131, 129,912.30 and 54,387 is: 75,060.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,131 : 129,912.30 = 54,387 : x
  2. Step 2: Convert to fraction form
    94,131/129,912.30 = 54,387/x
  3. Step 3: Cross multiply
    94,131x = 129,912.30 × 54,387
  4. Step 4: Simplify right side
    94,131x = 7,065,540,260.10
  5. Step 5: Solve for x
    x = 7,065,540,260.10/94,131
  6. Step 6: Final answer
    x = 75,060.72

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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.