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Finding the Fourth Proportional to 73,223.20, 109,705.20 and 68,557.60

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Solution

The fourth proportional to 73,223.20, 109,705.20 and 68,557.60 is: 102,715.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,223.20 : 109,705.20 = 68,557.60 : x
  2. Step 2: Convert to fraction form
    73,223.20/109,705.20 = 68,557.60/x
  3. Step 3: Cross multiply
    73,223.20x = 109,705.20 × 68,557.60
  4. Step 4: Simplify right side
    73,223.20x = 7,521,125,219.52
  5. Step 5: Solve for x
    x = 7,521,125,219.52/73,223.20
  6. Step 6: Final answer
    x = 102,715.06

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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.