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Finding the Fourth Proportional to 45,909.20, 68,863.80 and 40,368.80

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Solution

The fourth proportional to 45,909.20, 68,863.80 and 40,368.80 is: 60,553.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,909.20 : 68,863.80 = 40,368.80 : x
  2. Step 2: Convert to fraction form
    45,909.20/68,863.80 = 40,368.80/x
  3. Step 3: Cross multiply
    45,909.20x = 68,863.80 × 40,368.80
  4. Step 4: Simplify right side
    45,909.20x = 2,779,948,969.44
  5. Step 5: Solve for x
    x = 2,779,948,969.44/45,909.20
  6. Step 6: Final answer
    x = 60,553.20

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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.