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Finding the Fourth Proportional to 66,658.92, 91,989.36 and 36,443.76

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Solution

The fourth proportional to 66,658.92, 91,989.36 and 36,443.76 is: 50,292.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,658.92 : 91,989.36 = 36,443.76 : x
  2. Step 2: Convert to fraction form
    66,658.92/91,989.36 = 36,443.76/x
  3. Step 3: Cross multiply
    66,658.92x = 91,989.36 × 36,443.76
  4. Step 4: Simplify right side
    66,658.92x = 3,352,438,158.39
  5. Step 5: Solve for x
    x = 3,352,438,158.39/66,658.92
  6. Step 6: Final answer
    x = 50,292.42

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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.