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Finding the Fourth Proportional to 84,940.72, 127,417.08 and 25,781.20

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Solution

The fourth proportional to 84,940.72, 127,417.08 and 25,781.20 is: 38,673.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,940.72 : 127,417.08 = 25,781.20 : x
  2. Step 2: Convert to fraction form
    84,940.72/127,417.08 = 25,781.20/x
  3. Step 3: Cross multiply
    84,940.72x = 127,417.08 × 25,781.20
  4. Step 4: Simplify right side
    84,940.72x = 3,284,965,222.90
  5. Step 5: Solve for x
    x = 3,284,965,222.90/84,940.72
  6. Step 6: Final answer
    x = 38,673.62

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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.