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Finding the Fourth Proportional to 217,112.80, 325,726.80 and 76,856.80

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Solution

The fourth proportional to 217,112.80, 325,726.80 and 76,856.80 is: 115,305.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,112.80 : 325,726.80 = 76,856.80 : x
  2. Step 2: Convert to fraction form
    217,112.80/325,726.80 = 76,856.80/x
  3. Step 3: Cross multiply
    217,112.80x = 325,726.80 × 76,856.80
  4. Step 4: Simplify right side
    217,112.80x = 25,034,319,522.24
  5. Step 5: Solve for x
    x = 25,034,319,522.24/217,112.80
  6. Step 6: Final answer
    x = 115,305.59

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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.