Home / 81,542.28-112,480.56-51,279.60

Finding the Fourth Proportional to 81,542.28, 112,480.56 and 51,279.60

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Solution

The fourth proportional to 81,542.28, 112,480.56 and 51,279.60 is: 70,735.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,542.28 : 112,480.56 = 51,279.60 : x
  2. Step 2: Convert to fraction form
    81,542.28/112,480.56 = 51,279.60/x
  3. Step 3: Cross multiply
    81,542.28x = 112,480.56 × 51,279.60
  4. Step 4: Simplify right side
    81,542.28x = 5,767,958,124.58
  5. Step 5: Solve for x
    x = 5,767,958,124.58/81,542.28
  6. Step 6: Final answer
    x = 70,735.80

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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.