Home / 80,720.12-111,361.56-52,036.40

Finding the Fourth Proportional to 80,720.12, 111,361.56 and 52,036.40

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Solution

The fourth proportional to 80,720.12, 111,361.56 and 52,036.40 is: 71,789.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,720.12 : 111,361.56 = 52,036.40 : x
  2. Step 2: Convert to fraction form
    80,720.12/111,361.56 = 52,036.40/x
  3. Step 3: Cross multiply
    80,720.12x = 111,361.56 × 52,036.40
  4. Step 4: Simplify right side
    80,720.12x = 5,794,854,680.78
  5. Step 5: Solve for x
    x = 5,794,854,680.78/80,720.12
  6. Step 6: Final answer
    x = 71,789.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.