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Finding the Fourth Proportional to 218,772.60, 327,502.80 and 129,980.40

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Solution

The fourth proportional to 218,772.60, 327,502.80 and 129,980.40 is: 194,580.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,772.60 : 327,502.80 = 129,980.40 : x
  2. Step 2: Convert to fraction form
    218,772.60/327,502.80 = 129,980.40/x
  3. Step 3: Cross multiply
    218,772.60x = 327,502.80 × 129,980.40
  4. Step 4: Simplify right side
    218,772.60x = 42,568,944,945.12
  5. Step 5: Solve for x
    x = 42,568,944,945.12/218,772.60
  6. Step 6: Final answer
    x = 194,580.79

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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.