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Finding the Fourth Proportional to 68,387.10, 94,389.94 and 40,101.90

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Solution

The fourth proportional to 68,387.10, 94,389.94 and 40,101.90 is: 55,349.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,387.10 : 94,389.94 = 40,101.90 : x
  2. Step 2: Convert to fraction form
    68,387.10/94,389.94 = 40,101.90/x
  3. Step 3: Cross multiply
    68,387.10x = 94,389.94 × 40,101.90
  4. Step 4: Simplify right side
    68,387.10x = 3,785,215,934.89
  5. Step 5: Solve for x
    x = 3,785,215,934.89/68,387.10
  6. Step 6: Final answer
    x = 55,349.85

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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.