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Finding the Fourth Proportional to 61,085.44, 91,472.64 and 40,245.76

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Solution

The fourth proportional to 61,085.44, 91,472.64 and 40,245.76 is: 60,266.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,085.44 : 91,472.64 = 40,245.76 : x
  2. Step 2: Convert to fraction form
    61,085.44/91,472.64 = 40,245.76/x
  3. Step 3: Cross multiply
    61,085.44x = 91,472.64 × 40,245.76
  4. Step 4: Simplify right side
    61,085.44x = 3,681,385,916.01
  5. Step 5: Solve for x
    x = 3,681,385,916.01/61,085.44
  6. Step 6: Final answer
    x = 60,266.18

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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.