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Finding the Fourth Proportional to 112,483.20, 168,640.80 and 68,099.28

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Solution

The fourth proportional to 112,483.20, 168,640.80 and 68,099.28 is: 102,098.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,483.20 : 168,640.80 = 68,099.28 : x
  2. Step 2: Convert to fraction form
    112,483.20/168,640.80 = 68,099.28/x
  3. Step 3: Cross multiply
    112,483.20x = 168,640.80 × 68,099.28
  4. Step 4: Simplify right side
    112,483.20x = 11,484,317,058.62
  5. Step 5: Solve for x
    x = 11,484,317,058.62/112,483.20
  6. Step 6: Final answer
    x = 102,098.06

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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.