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Finding the Fourth Proportional to 71,728.70, 107,463.45 and 61,360.70

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Solution

The fourth proportional to 71,728.70, 107,463.45 and 61,360.70 is: 91,930.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,728.70 : 107,463.45 = 61,360.70 : x
  2. Step 2: Convert to fraction form
    71,728.70/107,463.45 = 61,360.70/x
  3. Step 3: Cross multiply
    71,728.70x = 107,463.45 × 61,360.70
  4. Step 4: Simplify right side
    71,728.70x = 6,594,032,516.42
  5. Step 5: Solve for x
    x = 6,594,032,516.42/71,728.70
  6. Step 6: Final answer
    x = 91,930.18

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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.