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Finding the Fourth Proportional to 68,707.20, 103,065.60 and 27,148.80

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Solution

The fourth proportional to 68,707.20, 103,065.60 and 27,148.80 is: 40,725.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,707.20 : 103,065.60 = 27,148.80 : x
  2. Step 2: Convert to fraction form
    68,707.20/103,065.60 = 27,148.80/x
  3. Step 3: Cross multiply
    68,707.20x = 103,065.60 × 27,148.80
  4. Step 4: Simplify right side
    68,707.20x = 2,798,107,361.28
  5. Step 5: Solve for x
    x = 2,798,107,361.28/68,707.20
  6. Step 6: Final answer
    x = 40,725.10

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1.5x scale

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.