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Finding the Fourth Proportional to 54,212.80, 81,319.20 and 45,659.20

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Solution

The fourth proportional to 54,212.80, 81,319.20 and 45,659.20 is: 68,488.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,212.80 : 81,319.20 = 45,659.20 : x
  2. Step 2: Convert to fraction form
    54,212.80/81,319.20 = 45,659.20/x
  3. Step 3: Cross multiply
    54,212.80x = 81,319.20 × 45,659.20
  4. Step 4: Simplify right side
    54,212.80x = 3,712,969,616.64
  5. Step 5: Solve for x
    x = 3,712,969,616.64/54,212.80
  6. Step 6: Final answer
    x = 68,488.80

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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.