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Finding the Fourth Proportional to 121,699, 167,944.64 and 68,707

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Solution

The fourth proportional to 121,699, 167,944.64 and 68,707 is: 94,815.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,699 : 167,944.64 = 68,707 : x
  2. Step 2: Convert to fraction form
    121,699/167,944.64 = 68,707/x
  3. Step 3: Cross multiply
    121,699x = 167,944.64 × 68,707
  4. Step 4: Simplify right side
    121,699x = 11,538,972,380.48
  5. Step 5: Solve for x
    x = 11,538,972,380.48/121,699
  6. Step 6: Final answer
    x = 94,815.67

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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.