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Finding the Fourth Proportional to 78,531.42, 117,773.60 and 33,550.97

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Solution

The fourth proportional to 78,531.42, 117,773.60 and 33,550.97 is: 50,316.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,531.42 : 117,773.60 = 33,550.97 : x
  2. Step 2: Convert to fraction form
    78,531.42/117,773.60 = 33,550.97/x
  3. Step 3: Cross multiply
    78,531.42x = 117,773.60 × 33,550.97
  4. Step 4: Simplify right side
    78,531.42x = 3,951,417,763.77
  5. Step 5: Solve for x
    x = 3,951,417,763.77/78,531.42
  6. Step 6: Final answer
    x = 50,316.39

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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.