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Finding the Fourth Proportional to 78,432.70, 117,648.80 and 22,272.88

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Solution

The fourth proportional to 78,432.70, 117,648.80 and 22,272.88 is: 33,409.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,432.70 : 117,648.80 = 22,272.88 : x
  2. Step 2: Convert to fraction form
    78,432.70/117,648.80 = 22,272.88/x
  3. Step 3: Cross multiply
    78,432.70x = 117,648.80 × 22,272.88
  4. Step 4: Simplify right side
    78,432.70x = 2,620,377,604.54
  5. Step 5: Solve for x
    x = 2,620,377,604.54/78,432.70
  6. Step 6: Final answer
    x = 33,409.25

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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.