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Finding the Fourth Proportional to 235,854.32, 325,474.74 and 128,422.40

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Solution

The fourth proportional to 235,854.32, 325,474.74 and 128,422.40 is: 177,220.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,854.32 : 325,474.74 = 128,422.40 : x
  2. Step 2: Convert to fraction form
    235,854.32/325,474.74 = 128,422.40/x
  3. Step 3: Cross multiply
    235,854.32x = 325,474.74 × 128,422.40
  4. Step 4: Simplify right side
    235,854.32x = 41,798,245,622.80
  5. Step 5: Solve for x
    x = 41,798,245,622.80/235,854.32
  6. Step 6: Final answer
    x = 177,220.61

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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.