Home / 387,287.20-580,931.24-121,049.12

Finding the Fourth Proportional to 387,287.20, 580,931.24 and 121,049.12

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Solution

The fourth proportional to 387,287.20, 580,931.24 and 121,049.12 is: 181,573.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,287.20 : 580,931.24 = 121,049.12 : x
  2. Step 2: Convert to fraction form
    387,287.20/580,931.24 = 121,049.12/x
  3. Step 3: Cross multiply
    387,287.20x = 580,931.24 × 121,049.12
  4. Step 4: Simplify right side
    387,287.20x = 70,321,215,382.51
  5. Step 5: Solve for x
    x = 70,321,215,382.51/387,287.20
  6. Step 6: Final answer
    x = 181,573.82

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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.