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Finding the Fourth Proportional to 218,080.30, 326,926.59 and 84,929.80

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Solution

The fourth proportional to 218,080.30, 326,926.59 and 84,929.80 is: 127,319.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,080.30 : 326,926.59 = 84,929.80 : x
  2. Step 2: Convert to fraction form
    218,080.30/326,926.59 = 84,929.80/x
  3. Step 3: Cross multiply
    218,080.30x = 326,926.59 × 84,929.80
  4. Step 4: Simplify right side
    218,080.30x = 27,765,809,903.38
  5. Step 5: Solve for x
    x = 27,765,809,903.38/218,080.30
  6. Step 6: Final answer
    x = 127,319.20

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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.