Home / 151,639.80-209,195.20-87,940.68

Finding the Fourth Proportional to 151,639.80, 209,195.20 and 87,940.68

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Solution

The fourth proportional to 151,639.80, 209,195.20 and 87,940.68 is: 121,318.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,639.80 : 209,195.20 = 87,940.68 : x
  2. Step 2: Convert to fraction form
    151,639.80/209,195.20 = 87,940.68/x
  3. Step 3: Cross multiply
    151,639.80x = 209,195.20 × 87,940.68
  4. Step 4: Simplify right side
    151,639.80x = 18,396,768,140.74
  5. Step 5: Solve for x
    x = 18,396,768,140.74/151,639.80
  6. Step 6: Final answer
    x = 121,318.86

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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.