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Finding the Fourth Proportional to 112,212.88, 154,854.60 and 61,913.68

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Solution

The fourth proportional to 112,212.88, 154,854.60 and 61,913.68 is: 85,441.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,212.88 : 154,854.60 = 61,913.68 : x
  2. Step 2: Convert to fraction form
    112,212.88/154,854.60 = 61,913.68/x
  3. Step 3: Cross multiply
    112,212.88x = 154,854.60 × 61,913.68
  4. Step 4: Simplify right side
    112,212.88x = 9,587,618,150.93
  5. Step 5: Solve for x
    x = 9,587,618,150.93/112,212.88
  6. Step 6: Final answer
    x = 85,441.33

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Why These Related Problems?

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