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Finding the Fourth Proportional to 121,578.96, 167,404.68 and 103,633.68

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Solution

The fourth proportional to 121,578.96, 167,404.68 and 103,633.68 is: 142,695.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,578.96 : 167,404.68 = 103,633.68 : x
  2. Step 2: Convert to fraction form
    121,578.96/167,404.68 = 103,633.68/x
  3. Step 3: Cross multiply
    121,578.96x = 167,404.68 × 103,633.68
  4. Step 4: Simplify right side
    121,578.96x = 17,348,763,037.62
  5. Step 5: Solve for x
    x = 17,348,763,037.62/121,578.96
  6. Step 6: Final answer
    x = 142,695.44

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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.