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Finding the Fourth Proportional to 60,770.80, 91,156.20 and 21,331.90

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Solution

The fourth proportional to 60,770.80, 91,156.20 and 21,331.90 is: 31,997.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,770.80 : 91,156.20 = 21,331.90 : x
  2. Step 2: Convert to fraction form
    60,770.80/91,156.20 = 21,331.90/x
  3. Step 3: Cross multiply
    60,770.80x = 91,156.20 × 21,331.90
  4. Step 4: Simplify right side
    60,770.80x = 1,944,534,942.78
  5. Step 5: Solve for x
    x = 1,944,534,942.78/60,770.80
  6. Step 6: Final answer
    x = 31,997.85

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1.5x scale

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.