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Finding the Fourth Proportional to 72,245.52, 99,718.12 and 67,839.76

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Solution

The fourth proportional to 72,245.52, 99,718.12 and 67,839.76 is: 93,636.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,245.52 : 99,718.12 = 67,839.76 : x
  2. Step 2: Convert to fraction form
    72,245.52/99,718.12 = 67,839.76/x
  3. Step 3: Cross multiply
    72,245.52x = 99,718.12 × 67,839.76
  4. Step 4: Simplify right side
    72,245.52x = 6,764,853,328.45
  5. Step 5: Solve for x
    x = 6,764,853,328.45/72,245.52
  6. Step 6: Final answer
    x = 93,636.99

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1.5x scale

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.