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Finding the Fourth Proportional to 121,699.58, 167,942.14 and 66,506.72

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Solution

The fourth proportional to 121,699.58, 167,942.14 and 66,506.72 is: 91,777.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,699.58 : 167,942.14 = 66,506.72 : x
  2. Step 2: Convert to fraction form
    121,699.58/167,942.14 = 66,506.72/x
  3. Step 3: Cross multiply
    121,699.58x = 167,942.14 × 66,506.72
  4. Step 4: Simplify right side
    121,699.58x = 11,169,280,881.18
  5. Step 5: Solve for x
    x = 11,169,280,881.18/121,699.58
  6. Step 6: Final answer
    x = 91,777.48

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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.