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Finding the Fourth Proportional to 67,221.40, 100,832.10 and 61,972.60

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Solution

The fourth proportional to 67,221.40, 100,832.10 and 61,972.60 is: 92,958.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,221.40 : 100,832.10 = 61,972.60 : x
  2. Step 2: Convert to fraction form
    67,221.40/100,832.10 = 61,972.60/x
  3. Step 3: Cross multiply
    67,221.40x = 100,832.10 × 61,972.60
  4. Step 4: Simplify right side
    67,221.40x = 6,248,827,400.46
  5. Step 5: Solve for x
    x = 6,248,827,400.46/67,221.40
  6. Step 6: Final answer
    x = 92,958.90

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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.