Home / 78,215.22-117,331.92-28,318.82

Finding the Fourth Proportional to 78,215.22, 117,331.92 and 28,318.82

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Solution

The fourth proportional to 78,215.22, 117,331.92 and 28,318.82 is: 42,481.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,215.22 : 117,331.92 = 28,318.82 : x
  2. Step 2: Convert to fraction form
    78,215.22/117,331.92 = 28,318.82/x
  3. Step 3: Cross multiply
    78,215.22x = 117,331.92 × 28,318.82
  4. Step 4: Simplify right side
    78,215.22x = 3,322,700,936.07
  5. Step 5: Solve for x
    x = 3,322,700,936.07/78,215.22
  6. Step 6: Final answer
    x = 42,481.51

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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.