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Finding the Fourth Proportional to 92,949.20, 139,270.20 and 79,125.20

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Solution

The fourth proportional to 92,949.20, 139,270.20 and 79,125.20 is: 118,557.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,949.20 : 139,270.20 = 79,125.20 : x
  2. Step 2: Convert to fraction form
    92,949.20/139,270.20 = 79,125.20/x
  3. Step 3: Cross multiply
    92,949.20x = 139,270.20 × 79,125.20
  4. Step 4: Simplify right side
    92,949.20x = 11,019,782,429.04
  5. Step 5: Solve for x
    x = 11,019,782,429.04/92,949.20
  6. Step 6: Final answer
    x = 118,557.04

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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.