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Finding the Fourth Proportional to 112,218.88, 154,862.88 and 61,919.68

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Solution

The fourth proportional to 112,218.88, 154,862.88 and 61,919.68 is: 85,449.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,218.88 : 154,862.88 = 61,919.68 : x
  2. Step 2: Convert to fraction form
    112,218.88/154,862.88 = 61,919.68/x
  3. Step 3: Cross multiply
    112,218.88x = 154,862.88 × 61,919.68
  4. Step 4: Simplify right side
    112,218.88x = 9,589,059,973.48
  5. Step 5: Solve for x
    x = 9,589,059,973.48/112,218.88
  6. Step 6: Final answer
    x = 85,449.61

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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.