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Finding the Fourth Proportional to 235,863.12, 325,490.88 and 128,433.92

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Solution

The fourth proportional to 235,863.12, 325,490.88 and 128,433.92 is: 177,238.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,863.12 : 325,490.88 = 128,433.92 : x
  2. Step 2: Convert to fraction form
    235,863.12/325,490.88 = 128,433.92/x
  3. Step 3: Cross multiply
    235,863.12x = 325,490.88 × 128,433.92
  4. Step 4: Simplify right side
    235,863.12x = 41,804,069,642.65
  5. Step 5: Solve for x
    x = 41,804,069,642.65/235,863.12
  6. Step 6: Final answer
    x = 177,238.69

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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.