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Finding the Fourth Proportional to 61,223.40, 91,719.90 and 31,540.20

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Solution

The fourth proportional to 61,223.40, 91,719.90 and 31,540.20 is: 47,250.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,223.40 : 91,719.90 = 31,540.20 : x
  2. Step 2: Convert to fraction form
    61,223.40/91,719.90 = 31,540.20/x
  3. Step 3: Cross multiply
    61,223.40x = 91,719.90 × 31,540.20
  4. Step 4: Simplify right side
    61,223.40x = 2,892,863,989.98
  5. Step 5: Solve for x
    x = 2,892,863,989.98/61,223.40
  6. Step 6: Final answer
    x = 47,250.95

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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.