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Finding the Fourth Proportional to 112,213.69, 154,854.89 and 61,912.69

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Solution

The fourth proportional to 112,213.69, 154,854.89 and 61,912.69 is: 85,439.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,213.69 : 154,854.89 = 61,912.69 : x
  2. Step 2: Convert to fraction form
    112,213.69/154,854.89 = 61,912.69/x
  3. Step 3: Cross multiply
    112,213.69x = 154,854.89 × 61,912.69
  4. Step 4: Simplify right side
    112,213.69x = 9,587,482,335.03
  5. Step 5: Solve for x
    x = 9,587,482,335.03/112,213.69
  6. Step 6: Final answer
    x = 85,439.51

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.