Home / 45,431.10-68,138.55-28,761.30

Finding the Fourth Proportional to 45,431.10, 68,138.55 and 28,761.30

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Solution

The fourth proportional to 45,431.10, 68,138.55 and 28,761.30 is: 43,136.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,431.10 : 68,138.55 = 28,761.30 : x
  2. Step 2: Convert to fraction form
    45,431.10/68,138.55 = 28,761.30/x
  3. Step 3: Cross multiply
    45,431.10x = 68,138.55 × 28,761.30
  4. Step 4: Simplify right side
    45,431.10x = 1,959,753,278.12
  5. Step 5: Solve for x
    x = 1,959,753,278.12/45,431.10
  6. Step 6: Final answer
    x = 43,136.82

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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.