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Finding the Fourth Proportional to 84,862.78, 127,321.85 and 40,483.78

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Solution

The fourth proportional to 84,862.78, 127,321.85 and 40,483.78 is: 60,738.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,862.78 : 127,321.85 = 40,483.78 : x
  2. Step 2: Convert to fraction form
    84,862.78/127,321.85 = 40,483.78/x
  3. Step 3: Cross multiply
    84,862.78x = 127,321.85 × 40,483.78
  4. Step 4: Simplify right side
    84,862.78x = 5,154,469,547.50
  5. Step 5: Solve for x
    x = 5,154,469,547.50/84,862.78
  6. Step 6: Final answer
    x = 60,738.87

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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.