Home / 90,079.20-124,359.04-54,278

Finding the Fourth Proportional to 90,079.20, 124,359.04 and 54,278

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Solution

The fourth proportional to 90,079.20, 124,359.04 and 54,278 is: 74,933.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,079.20 : 124,359.04 = 54,278 : x
  2. Step 2: Convert to fraction form
    90,079.20/124,359.04 = 54,278/x
  3. Step 3: Cross multiply
    90,079.20x = 124,359.04 × 54,278
  4. Step 4: Simplify right side
    90,079.20x = 6,749,959,973.12
  5. Step 5: Solve for x
    x = 6,749,959,973.12/90,079.20
  6. Step 6: Final answer
    x = 74,933.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.