Home / 83,690.55-115,512.86-47,901.20

Finding the Fourth Proportional to 83,690.55, 115,512.86 and 47,901.20

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Solution

The fourth proportional to 83,690.55, 115,512.86 and 47,901.20 is: 66,115.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,690.55 : 115,512.86 = 47,901.20 : x
  2. Step 2: Convert to fraction form
    83,690.55/115,512.86 = 47,901.20/x
  3. Step 3: Cross multiply
    83,690.55x = 115,512.86 × 47,901.20
  4. Step 4: Simplify right side
    83,690.55x = 5,533,204,151.62
  5. Step 5: Solve for x
    x = 5,533,204,151.62/83,690.55
  6. Step 6: Final answer
    x = 66,115.04

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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.