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Finding the Fourth Proportional to 235,988.25, 325,660.82 and 128,555.98

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Solution

The fourth proportional to 235,988.25, 325,660.82 and 128,555.98 is: 177,405.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,988.25 : 325,660.82 = 128,555.98 : x
  2. Step 2: Convert to fraction form
    235,988.25/325,660.82 = 128,555.98/x
  3. Step 3: Cross multiply
    235,988.25x = 325,660.82 × 128,555.98
  4. Step 4: Simplify right side
    235,988.25x = 41,865,645,128.90
  5. Step 5: Solve for x
    x = 41,865,645,128.90/235,988.25
  6. Step 6: Final answer
    x = 177,405.63

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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.