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Finding the Fourth Proportional to 158,685.59, 218,986.11 and 90,704.03

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Solution

The fourth proportional to 158,685.59, 218,986.11 and 90,704.03 is: 125,171.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,685.59 : 218,986.11 = 90,704.03 : x
  2. Step 2: Convert to fraction form
    158,685.59/218,986.11 = 90,704.03/x
  3. Step 3: Cross multiply
    158,685.59x = 218,986.11 × 90,704.03
  4. Step 4: Simplify right side
    158,685.59x = 19,862,921,596.09
  5. Step 5: Solve for x
    x = 19,862,921,596.09/158,685.59
  6. Step 6: Final answer
    x = 125,171.55

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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.