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Finding the Fourth Proportional to 71,893.95, 99,213.75 and 40,062.15

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Solution

The fourth proportional to 71,893.95, 99,213.75 and 40,062.15 is: 55,285.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,893.95 : 99,213.75 = 40,062.15 : x
  2. Step 2: Convert to fraction form
    71,893.95/99,213.75 = 40,062.15/x
  3. Step 3: Cross multiply
    71,893.95x = 99,213.75 × 40,062.15
  4. Step 4: Simplify right side
    71,893.95x = 3,974,716,134.56
  5. Step 5: Solve for x
    x = 3,974,716,134.56/71,893.95
  6. Step 6: Final answer
    x = 55,285.82

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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.