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Finding the Fourth Proportional to 61,040.70, 91,561.05 and 40,113.90

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Solution

The fourth proportional to 61,040.70, 91,561.05 and 40,113.90 is: 60,170.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,040.70 : 91,561.05 = 40,113.90 : x
  2. Step 2: Convert to fraction form
    61,040.70/91,561.05 = 40,113.90/x
  3. Step 3: Cross multiply
    61,040.70x = 91,561.05 × 40,113.90
  4. Step 4: Simplify right side
    61,040.70x = 3,672,870,803.60
  5. Step 5: Solve for x
    x = 3,672,870,803.60/61,040.70
  6. Step 6: Final answer
    x = 60,170.85

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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.