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Finding the Fourth Proportional to 123,450.78, 170,375.94 and 69,739.28

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Solution

The fourth proportional to 123,450.78, 170,375.94 and 69,739.28 is: 96,248.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,450.78 : 170,375.94 = 69,739.28 : x
  2. Step 2: Convert to fraction form
    123,450.78/170,375.94 = 69,739.28/x
  3. Step 3: Cross multiply
    123,450.78x = 170,375.94 × 69,739.28
  4. Step 4: Simplify right side
    123,450.78x = 11,881,894,533.04
  5. Step 5: Solve for x
    x = 11,881,894,533.04/123,450.78
  6. Step 6: Final answer
    x = 96,248.03

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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.