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Finding the Fourth Proportional to 68,774.20, 103,064.10 and 42,400.60

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Solution

The fourth proportional to 68,774.20, 103,064.10 and 42,400.60 is: 63,540.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,774.20 : 103,064.10 = 42,400.60 : x
  2. Step 2: Convert to fraction form
    68,774.20/103,064.10 = 42,400.60/x
  3. Step 3: Cross multiply
    68,774.20x = 103,064.10 × 42,400.60
  4. Step 4: Simplify right side
    68,774.20x = 4,369,979,678.46
  5. Step 5: Solve for x
    x = 4,369,979,678.46/68,774.20
  6. Step 6: Final answer
    x = 63,540.97

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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.