Home / 82,961.40-124,442.55-20,631.90

Finding the Fourth Proportional to 82,961.40, 124,442.55 and 20,631.90

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Solution

The fourth proportional to 82,961.40, 124,442.55 and 20,631.90 is: 30,947.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,961.40 : 124,442.55 = 20,631.90 : x
  2. Step 2: Convert to fraction form
    82,961.40/124,442.55 = 20,631.90/x
  3. Step 3: Cross multiply
    82,961.40x = 124,442.55 × 20,631.90
  4. Step 4: Simplify right side
    82,961.40x = 2,567,486,247.35
  5. Step 5: Solve for x
    x = 2,567,486,247.35/82,961.40
  6. Step 6: Final answer
    x = 30,947.96

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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.