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Finding the Fourth Proportional to 43,805.20, 65,712.60 and 42,422.80

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Solution

The fourth proportional to 43,805.20, 65,712.60 and 42,422.80 is: 63,638.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,805.20 : 65,712.60 = 42,422.80 : x
  2. Step 2: Convert to fraction form
    43,805.20/65,712.60 = 42,422.80/x
  3. Step 3: Cross multiply
    43,805.20x = 65,712.60 × 42,422.80
  4. Step 4: Simplify right side
    43,805.20x = 2,787,712,487.28
  5. Step 5: Solve for x
    x = 2,787,712,487.28/43,805.20
  6. Step 6: Final answer
    x = 63,638.85

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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.