Home / 221,116.72-305,149.28-125,639.52

Finding the Fourth Proportional to 221,116.72, 305,149.28 and 125,639.52

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Solution

The fourth proportional to 221,116.72, 305,149.28 and 125,639.52 is: 173,387.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,116.72 : 305,149.28 = 125,639.52 : x
  2. Step 2: Convert to fraction form
    221,116.72/305,149.28 = 125,639.52/x
  3. Step 3: Cross multiply
    221,116.72x = 305,149.28 × 125,639.52
  4. Step 4: Simplify right side
    221,116.72x = 38,338,809,067.55
  5. Step 5: Solve for x
    x = 38,338,809,067.55/221,116.72
  6. Step 6: Final answer
    x = 173,387.20

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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.