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Finding the Fourth Proportional to 54,145.50, 81,059.87 and 31,587.20

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Solution

The fourth proportional to 54,145.50, 81,059.87 and 31,587.20 is: 47,288.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,145.50 : 81,059.87 = 31,587.20 : x
  2. Step 2: Convert to fraction form
    54,145.50/81,059.87 = 31,587.20/x
  3. Step 3: Cross multiply
    54,145.50x = 81,059.87 × 31,587.20
  4. Step 4: Simplify right side
    54,145.50x = 2,560,454,325.66
  5. Step 5: Solve for x
    x = 2,560,454,325.66/54,145.50
  6. Step 6: Final answer
    x = 47,288.40

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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.