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Finding the Fourth Proportional to 235,995.30, 325,671.90 and 128,565.42

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Solution

The fourth proportional to 235,995.30, 325,671.90 and 128,565.42 is: 177,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,995.30 : 325,671.90 = 128,565.42 : x
  2. Step 2: Convert to fraction form
    235,995.30/325,671.90 = 128,565.42/x
  3. Step 3: Cross multiply
    235,995.30x = 325,671.90 × 128,565.42
  4. Step 4: Simplify right side
    235,995.30x = 41,870,144,605.70
  5. Step 5: Solve for x
    x = 41,870,144,605.70/235,995.30
  6. Step 6: Final answer
    x = 177,419.40

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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.