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Finding the Fourth Proportional to 81,071, 121,607.04 and 25,667

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Solution

The fourth proportional to 81,071, 121,607.04 and 25,667 is: 38,500.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,071 : 121,607.04 = 25,667 : x
  2. Step 2: Convert to fraction form
    81,071/121,607.04 = 25,667/x
  3. Step 3: Cross multiply
    81,071x = 121,607.04 × 25,667
  4. Step 4: Simplify right side
    81,071x = 3,121,287,895.68
  5. Step 5: Solve for x
    x = 3,121,287,895.68/81,071
  6. Step 6: Final answer
    x = 38,500.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.