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Finding the Fourth Proportional to 71,885.76, 99,211.12 and 43,591.36

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Solution

The fourth proportional to 71,885.76, 99,211.12 and 43,591.36 is: 60,161.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,885.76 : 99,211.12 = 43,591.36 : x
  2. Step 2: Convert to fraction form
    71,885.76/99,211.12 = 43,591.36/x
  3. Step 3: Cross multiply
    71,885.76x = 99,211.12 × 43,591.36
  4. Step 4: Simplify right side
    71,885.76x = 4,324,747,647.92
  5. Step 5: Solve for x
    x = 4,324,747,647.92/71,885.76
  6. Step 6: Final answer
    x = 60,161.40

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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.