Home / 278,902.20-418,309.26-121,088.28

Finding the Fourth Proportional to 278,902.20, 418,309.26 and 121,088.28

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Solution

The fourth proportional to 278,902.20, 418,309.26 and 121,088.28 is: 181,613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,902.20 : 418,309.26 = 121,088.28 : x
  2. Step 2: Convert to fraction form
    278,902.20/418,309.26 = 121,088.28/x
  3. Step 3: Cross multiply
    278,902.20x = 418,309.26 × 121,088.28
  4. Step 4: Simplify right side
    278,902.20x = 50,652,348,801.47
  5. Step 5: Solve for x
    x = 50,652,348,801.47/278,902.20
  6. Step 6: Final answer
    x = 181,613.30

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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.