Home / 278,781.08-417,763.38-138,259.04

Finding the Fourth Proportional to 278,781.08, 417,763.38 and 138,259.04

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Solution

The fourth proportional to 278,781.08, 417,763.38 and 138,259.04 is: 207,186.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,781.08 : 417,763.38 = 138,259.04 : x
  2. Step 2: Convert to fraction form
    278,781.08/417,763.38 = 138,259.04/x
  3. Step 3: Cross multiply
    278,781.08x = 417,763.38 × 138,259.04
  4. Step 4: Simplify right side
    278,781.08x = 57,759,563,865.96
  5. Step 5: Solve for x
    x = 57,759,563,865.96/278,781.08
  6. Step 6: Final answer
    x = 207,186.10

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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.