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Finding the Fourth Proportional to 60,233.76, 90,355.68 and 20,791.20

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Solution

The fourth proportional to 60,233.76, 90,355.68 and 20,791.20 is: 31,188.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,233.76 : 90,355.68 = 20,791.20 : x
  2. Step 2: Convert to fraction form
    60,233.76/90,355.68 = 20,791.20/x
  3. Step 3: Cross multiply
    60,233.76x = 90,355.68 × 20,791.20
  4. Step 4: Simplify right side
    60,233.76x = 1,878,603,014.02
  5. Step 5: Solve for x
    x = 1,878,603,014.02/60,233.76
  6. Step 6: Final answer
    x = 31,188.54

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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.