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Finding the Fourth Proportional to 121,859.52, 168,159.16 and 67,408.44

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Solution

The fourth proportional to 121,859.52, 168,159.16 and 67,408.44 is: 93,019.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,859.52 : 168,159.16 = 67,408.44 : x
  2. Step 2: Convert to fraction form
    121,859.52/168,159.16 = 67,408.44/x
  3. Step 3: Cross multiply
    121,859.52x = 168,159.16 × 67,408.44
  4. Step 4: Simplify right side
    121,859.52x = 11,335,346,647.31
  5. Step 5: Solve for x
    x = 11,335,346,647.31/121,859.52
  6. Step 6: Final answer
    x = 93,019.79

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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.