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Finding the Fourth Proportional to 121,976.16, 168,327.94 and 68,266.16

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Solution

The fourth proportional to 121,976.16, 168,327.94 and 68,266.16 is: 94,207.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,976.16 : 168,327.94 = 68,266.16 : x
  2. Step 2: Convert to fraction form
    121,976.16/168,327.94 = 68,266.16/x
  3. Step 3: Cross multiply
    121,976.16x = 168,327.94 × 68,266.16
  4. Step 4: Simplify right side
    121,976.16x = 11,491,102,084.51
  5. Step 5: Solve for x
    x = 11,491,102,084.51/121,976.16
  6. Step 6: Final answer
    x = 94,207.77

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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.