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Finding the Fourth Proportional to 61,613.02, 84,986.82 and 40,393.66

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Solution

The fourth proportional to 61,613.02, 84,986.82 and 40,393.66 is: 55,717.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,613.02 : 84,986.82 = 40,393.66 : x
  2. Step 2: Convert to fraction form
    61,613.02/84,986.82 = 40,393.66/x
  3. Step 3: Cross multiply
    61,613.02x = 84,986.82 × 40,393.66
  4. Step 4: Simplify right side
    61,613.02x = 3,432,928,711.56
  5. Step 5: Solve for x
    x = 3,432,928,711.56/61,613.02
  6. Step 6: Final answer
    x = 55,717.59

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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.