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Finding the Fourth Proportional to 68,107.20, 93,987.68 and 39,807.20

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Solution

The fourth proportional to 68,107.20, 93,987.68 and 39,807.20 is: 54,933.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,107.20 : 93,987.68 = 39,807.20 : x
  2. Step 2: Convert to fraction form
    68,107.20/93,987.68 = 39,807.20/x
  3. Step 3: Cross multiply
    68,107.20x = 93,987.68 × 39,807.20
  4. Step 4: Simplify right side
    68,107.20x = 3,741,386,375.30
  5. Step 5: Solve for x
    x = 3,741,386,375.30/68,107.20
  6. Step 6: Final answer
    x = 54,933.79

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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.