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Finding the Fourth Proportional to 68,855.49, 95,020.20 and 38,640.78

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Solution

The fourth proportional to 68,855.49, 95,020.20 and 38,640.78 is: 53,324.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,855.49 : 95,020.20 = 38,640.78 : x
  2. Step 2: Convert to fraction form
    68,855.49/95,020.20 = 38,640.78/x
  3. Step 3: Cross multiply
    68,855.49x = 95,020.20 × 38,640.78
  4. Step 4: Simplify right side
    68,855.49x = 3,671,654,643.76
  5. Step 5: Solve for x
    x = 3,671,654,643.76/68,855.49
  6. Step 6: Final answer
    x = 53,324.07

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1.5x scale

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.