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Finding the Fourth Proportional to 121,894.32, 168,229.74 and 68,182.32

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Solution

The fourth proportional to 121,894.32, 168,229.74 and 68,182.32 is: 94,100.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,894.32 : 168,229.74 = 68,182.32 : x
  2. Step 2: Convert to fraction form
    121,894.32/168,229.74 = 68,182.32/x
  3. Step 3: Cross multiply
    121,894.32x = 168,229.74 × 68,182.32
  4. Step 4: Simplify right side
    121,894.32x = 11,470,293,966.20
  5. Step 5: Solve for x
    x = 11,470,293,966.20/121,894.32
  6. Step 6: Final answer
    x = 94,100.32

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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.