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Finding the Fourth Proportional to 158,560.50, 218,793.44 and 86,921.67

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Solution

The fourth proportional to 158,560.50, 218,793.44 and 86,921.67 is: 119,940.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,560.50 : 218,793.44 = 86,921.67 : x
  2. Step 2: Convert to fraction form
    158,560.50/218,793.44 = 86,921.67/x
  3. Step 3: Cross multiply
    158,560.50x = 218,793.44 × 86,921.67
  4. Step 4: Simplify right side
    158,560.50x = 19,017,890,755.24
  5. Step 5: Solve for x
    x = 19,017,890,755.24/158,560.50
  6. Step 6: Final answer
    x = 119,940.91

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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.