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Finding the Fourth Proportional to 235,990.43, 325,665.51 and 128,560.20

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Solution

The fourth proportional to 235,990.43, 325,665.51 and 128,560.20 is: 177,412.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,990.43 : 325,665.51 = 128,560.20 : x
  2. Step 2: Convert to fraction form
    235,990.43/325,665.51 = 128,560.20/x
  3. Step 3: Cross multiply
    235,990.43x = 325,665.51 × 128,560.20
  4. Step 4: Simplify right side
    235,990.43x = 41,867,623,098.70
  5. Step 5: Solve for x
    x = 41,867,623,098.70/235,990.43
  6. Step 6: Final answer
    x = 177,412.38

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1.5x scale

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.