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Finding the Fourth Proportional to 123,800.78, 170,844.60 and 67,212.14

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Solution

The fourth proportional to 123,800.78, 170,844.60 and 67,212.14 is: 92,752.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,800.78 : 170,844.60 = 67,212.14 : x
  2. Step 2: Convert to fraction form
    123,800.78/170,844.60 = 67,212.14/x
  3. Step 3: Cross multiply
    123,800.78x = 170,844.60 × 67,212.14
  4. Step 4: Simplify right side
    123,800.78x = 11,482,831,173.44
  5. Step 5: Solve for x
    x = 11,482,831,173.44/123,800.78
  6. Step 6: Final answer
    x = 92,752.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.