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Finding the Fourth Proportional to 67,113.60, 100,747.20 and 39,427.20

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Solution

The fourth proportional to 67,113.60, 100,747.20 and 39,427.20 is: 59,185.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,113.60 : 100,747.20 = 39,427.20 : x
  2. Step 2: Convert to fraction form
    67,113.60/100,747.20 = 39,427.20/x
  3. Step 3: Cross multiply
    67,113.60x = 100,747.20 × 39,427.20
  4. Step 4: Simplify right side
    67,113.60x = 3,972,180,003.84
  5. Step 5: Solve for x
    x = 3,972,180,003.84/67,113.60
  6. Step 6: Final answer
    x = 59,185.92

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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.