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Finding the Fourth Proportional to 235,763.46, 325,359.86 and 128,340.72

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Solution

The fourth proportional to 235,763.46, 325,359.86 and 128,340.72 is: 177,113.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,763.46 : 325,359.86 = 128,340.72 : x
  2. Step 2: Convert to fraction form
    235,763.46/325,359.86 = 128,340.72/x
  3. Step 3: Cross multiply
    235,763.46x = 325,359.86 × 128,340.72
  4. Step 4: Simplify right side
    235,763.46x = 41,756,918,049.80
  5. Step 5: Solve for x
    x = 41,756,918,049.80/235,763.46
  6. Step 6: Final answer
    x = 177,113.61

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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.