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Finding the Fourth Proportional to 235,687.32, 325,238.82 and 128,257.80

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Solution

The fourth proportional to 235,687.32, 325,238.82 and 128,257.80 is: 176,990.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,687.32 : 325,238.82 = 128,257.80 : x
  2. Step 2: Convert to fraction form
    235,687.32/325,238.82 = 128,257.80/x
  3. Step 3: Cross multiply
    235,687.32x = 325,238.82 × 128,257.80
  4. Step 4: Simplify right side
    235,687.32x = 41,714,415,527.80
  5. Step 5: Solve for x
    x = 41,714,415,527.80/235,687.32
  6. Step 6: Final answer
    x = 176,990.50

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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.