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Finding the Fourth Proportional to 78,113.48, 117,170.22 and 21,951.32

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Solution

The fourth proportional to 78,113.48, 117,170.22 and 21,951.32 is: 32,926.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,113.48 : 117,170.22 = 21,951.32 : x
  2. Step 2: Convert to fraction form
    78,113.48/117,170.22 = 21,951.32/x
  3. Step 3: Cross multiply
    78,113.48x = 117,170.22 × 21,951.32
  4. Step 4: Simplify right side
    78,113.48x = 2,572,040,993.69
  5. Step 5: Solve for x
    x = 2,572,040,993.69/78,113.48
  6. Step 6: Final answer
    x = 32,926.98

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Similar ratio
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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.