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Finding the Fourth Proportional to 149,679.80, 206,593.60 and 86,054.56

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Solution

The fourth proportional to 149,679.80, 206,593.60 and 86,054.56 is: 118,775.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,679.80 : 206,593.60 = 86,054.56 : x
  2. Step 2: Convert to fraction form
    149,679.80/206,593.60 = 86,054.56/x
  3. Step 3: Cross multiply
    149,679.80x = 206,593.60 × 86,054.56
  4. Step 4: Simplify right side
    149,679.80x = 17,778,321,346.82
  5. Step 5: Solve for x
    x = 17,778,321,346.82/149,679.80
  6. Step 6: Final answer
    x = 118,775.69

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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.