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Finding the Fourth Proportional to 235,711.16, 325,275.14 and 128,278.88

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Solution

The fourth proportional to 235,711.16, 325,275.14 and 128,278.88 is: 177,021.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,711.16 : 325,275.14 = 128,278.88 : x
  2. Step 2: Convert to fraction form
    235,711.16/325,275.14 = 128,278.88/x
  3. Step 3: Cross multiply
    235,711.16x = 325,275.14 × 128,278.88
  4. Step 4: Simplify right side
    235,711.16x = 41,725,928,383.27
  5. Step 5: Solve for x
    x = 41,725,928,383.27/235,711.16
  6. Step 6: Final answer
    x = 177,021.44

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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.