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Finding the Fourth Proportional to 217,281.65, 325,825.28 and 84,117.65

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Solution

The fourth proportional to 217,281.65, 325,825.28 and 84,117.65 is: 126,138.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,281.65 : 325,825.28 = 84,117.65 : x
  2. Step 2: Convert to fraction form
    217,281.65/325,825.28 = 84,117.65/x
  3. Step 3: Cross multiply
    217,281.65x = 325,825.28 × 84,117.65
  4. Step 4: Simplify right side
    217,281.65x = 27,407,656,443.60
  5. Step 5: Solve for x
    x = 27,407,656,443.60/217,281.65
  6. Step 6: Final answer
    x = 126,138.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.