Home / 81,210.30-121,815.45-58,919.10

Finding the Fourth Proportional to 81,210.30, 121,815.45 and 58,919.10

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Solution

The fourth proportional to 81,210.30, 121,815.45 and 58,919.10 is: 88,378.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,210.30 : 121,815.45 = 58,919.10 : x
  2. Step 2: Convert to fraction form
    81,210.30/121,815.45 = 58,919.10/x
  3. Step 3: Cross multiply
    81,210.30x = 121,815.45 × 58,919.10
  4. Step 4: Simplify right side
    81,210.30x = 7,177,256,680.10
  5. Step 5: Solve for x
    x = 7,177,256,680.10/81,210.30
  6. Step 6: Final answer
    x = 88,378.65

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Similar ratio
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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.