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Finding the Fourth Proportional to 158,591.02, 218,855.91 and 86,971.57

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Solution

The fourth proportional to 158,591.02, 218,855.91 and 86,971.57 is: 120,020.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,591.02 : 218,855.91 = 86,971.57 : x
  2. Step 2: Convert to fraction form
    158,591.02/218,855.91 = 86,971.57/x
  3. Step 3: Cross multiply
    158,591.02x = 218,855.91 × 86,971.57
  4. Step 4: Simplify right side
    158,591.02x = 19,034,242,096.48
  5. Step 5: Solve for x
    x = 19,034,242,096.48/158,591.02
  6. Step 6: Final answer
    x = 120,020.93

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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.