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Finding the Fourth Proportional to 235,891.80, 325,532.79 and 128,462.31

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Solution

The fourth proportional to 235,891.80, 325,532.79 and 128,462.31 is: 177,279.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,891.80 : 325,532.79 = 128,462.31 : x
  2. Step 2: Convert to fraction form
    235,891.80/325,532.79 = 128,462.31/x
  3. Step 3: Cross multiply
    235,891.80x = 325,532.79 × 128,462.31
  4. Step 4: Simplify right side
    235,891.80x = 41,818,694,184.14
  5. Step 5: Solve for x
    x = 41,818,694,184.14/235,891.80
  6. Step 6: Final answer
    x = 177,279.13

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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.