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Finding the Fourth Proportional to 218,113.20, 326,926.80 and 84,949.20

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Solution

The fourth proportional to 218,113.20, 326,926.80 and 84,949.20 is: 127,329.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,113.20 : 326,926.80 = 84,949.20 : x
  2. Step 2: Convert to fraction form
    218,113.20/326,926.80 = 84,949.20/x
  3. Step 3: Cross multiply
    218,113.20x = 326,926.80 × 84,949.20
  4. Step 4: Simplify right side
    218,113.20x = 27,772,170,118.56
  5. Step 5: Solve for x
    x = 27,772,170,118.56/218,113.20
  6. Step 6: Final answer
    x = 127,329.16

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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.