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Finding the Fourth Proportional to 45,909.20, 68,863.80 and 45,617.60

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Solution

The fourth proportional to 45,909.20, 68,863.80 and 45,617.60 is: 68,426.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,909.20 : 68,863.80 = 45,617.60 : x
  2. Step 2: Convert to fraction form
    45,909.20/68,863.80 = 45,617.60/x
  3. Step 3: Cross multiply
    45,909.20x = 68,863.80 × 45,617.60
  4. Step 4: Simplify right side
    45,909.20x = 3,141,401,282.88
  5. Step 5: Solve for x
    x = 3,141,401,282.88/45,909.20
  6. Step 6: Final answer
    x = 68,426.40

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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.