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Finding the Fourth Proportional to 61,728.71, 85,192.52 and 34,872.94

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Solution

The fourth proportional to 61,728.71, 85,192.52 and 34,872.94 is: 48,128.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,728.71 : 85,192.52 = 34,872.94 : x
  2. Step 2: Convert to fraction form
    61,728.71/85,192.52 = 34,872.94/x
  3. Step 3: Cross multiply
    61,728.71x = 85,192.52 × 34,872.94
  4. Step 4: Simplify right side
    61,728.71x = 2,970,913,725.59
  5. Step 5: Solve for x
    x = 2,970,913,725.59/61,728.71
  6. Step 6: Final answer
    x = 48,128.56

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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.