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Finding the Fourth Proportional to 158,699.88, 218,971.60 and 91,593

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Solution

The fourth proportional to 158,699.88, 218,971.60 and 91,593 is: 126,378.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,699.88 : 218,971.60 = 91,593 : x
  2. Step 2: Convert to fraction form
    158,699.88/218,971.60 = 91,593/x
  3. Step 3: Cross multiply
    158,699.88x = 218,971.60 × 91,593
  4. Step 4: Simplify right side
    158,699.88x = 20,056,265,758.80
  5. Step 5: Solve for x
    x = 20,056,265,758.80/158,699.88
  6. Step 6: Final answer
    x = 126,378.58

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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.