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Finding the Fourth Proportional to 121,777.74, 168,060.96 and 68,066.64

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Solution

The fourth proportional to 121,777.74, 168,060.96 and 68,066.64 is: 93,936.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,777.74 : 168,060.96 = 68,066.64 : x
  2. Step 2: Convert to fraction form
    121,777.74/168,060.96 = 68,066.64/x
  3. Step 3: Cross multiply
    121,777.74x = 168,060.96 × 68,066.64
  4. Step 4: Simplify right side
    121,777.74x = 11,439,344,862.37
  5. Step 5: Solve for x
    x = 11,439,344,862.37/121,777.74
  6. Step 6: Final answer
    x = 93,936.26

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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.