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Finding the Fourth Proportional to 68,683.20, 103,029.60 and 27,124.80

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Solution

The fourth proportional to 68,683.20, 103,029.60 and 27,124.80 is: 40,689.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,683.20 : 103,029.60 = 27,124.80 : x
  2. Step 2: Convert to fraction form
    68,683.20/103,029.60 = 27,124.80/x
  3. Step 3: Cross multiply
    68,683.20x = 103,029.60 × 27,124.80
  4. Step 4: Simplify right side
    68,683.20x = 2,794,657,294.08
  5. Step 5: Solve for x
    x = 2,794,657,294.08/68,683.20
  6. Step 6: Final answer
    x = 40,689.10

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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.