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Finding the Fourth Proportional to 112,434.80, 168,781.80 and 68,111.60

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Solution

The fourth proportional to 112,434.80, 168,781.80 and 68,111.60 is: 102,245.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,434.80 : 168,781.80 = 68,111.60 : x
  2. Step 2: Convert to fraction form
    112,434.80/168,781.80 = 68,111.60/x
  3. Step 3: Cross multiply
    112,434.80x = 168,781.80 × 68,111.60
  4. Step 4: Simplify right side
    112,434.80x = 11,495,998,448.88
  5. Step 5: Solve for x
    x = 11,495,998,448.88/112,434.80
  6. Step 6: Final answer
    x = 102,245.91

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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.