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Finding the Fourth Proportional to 54,512.88, 81,711 and 28,191.12

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Solution

The fourth proportional to 54,512.88, 81,711 and 28,191.12 is: 42,256.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,512.88 : 81,711 = 28,191.12 : x
  2. Step 2: Convert to fraction form
    54,512.88/81,711 = 28,191.12/x
  3. Step 3: Cross multiply
    54,512.88x = 81,711 × 28,191.12
  4. Step 4: Simplify right side
    54,512.88x = 2,303,524,606.32
  5. Step 5: Solve for x
    x = 2,303,524,606.32/54,512.88
  6. Step 6: Final answer
    x = 42,256.52

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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.