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Finding the Fourth Proportional to 218,617.80, 327,926.70 and 130,144.20

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Solution

The fourth proportional to 218,617.80, 327,926.70 and 130,144.20 is: 195,216.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,617.80 : 327,926.70 = 130,144.20 : x
  2. Step 2: Convert to fraction form
    218,617.80/327,926.70 = 130,144.20/x
  3. Step 3: Cross multiply
    218,617.80x = 327,926.70 × 130,144.20
  4. Step 4: Simplify right side
    218,617.80x = 42,677,758,030.14
  5. Step 5: Solve for x
    x = 42,677,758,030.14/218,617.80
  6. Step 6: Final answer
    x = 195,216.30

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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.