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Finding the Fourth Proportional to 71,718.84, 107,535.06 and 42,122.52

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Solution

The fourth proportional to 71,718.84, 107,535.06 and 42,122.52 is: 63,158.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,718.84 : 107,535.06 = 42,122.52 : x
  2. Step 2: Convert to fraction form
    71,718.84/107,535.06 = 42,122.52/x
  3. Step 3: Cross multiply
    71,718.84x = 107,535.06 × 42,122.52
  4. Step 4: Simplify right side
    71,718.84x = 4,529,647,715.55
  5. Step 5: Solve for x
    x = 4,529,647,715.55/71,718.84
  6. Step 6: Final answer
    x = 63,158.41

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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.