Home / 288,037.12-431,867.20-138,273.28

Finding the Fourth Proportional to 288,037.12, 431,867.20 and 138,273.28

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Solution

The fourth proportional to 288,037.12, 431,867.20 and 138,273.28 is: 207,319.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,037.12 : 431,867.20 = 138,273.28 : x
  2. Step 2: Convert to fraction form
    288,037.12/431,867.20 = 138,273.28/x
  3. Step 3: Cross multiply
    288,037.12x = 431,867.20 × 138,273.28
  4. Step 4: Simplify right side
    288,037.12x = 59,715,694,268.42
  5. Step 5: Solve for x
    x = 59,715,694,268.42/288,037.12
  6. Step 6: Final answer
    x = 207,319.44

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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.