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Finding the Fourth Proportional to 158,626.88, 218,919.12 and 87,020.85

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Solution

The fourth proportional to 158,626.88, 218,919.12 and 87,020.85 is: 120,096.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,626.88 : 218,919.12 = 87,020.85 : x
  2. Step 2: Convert to fraction form
    158,626.88/218,919.12 = 87,020.85/x
  3. Step 3: Cross multiply
    158,626.88x = 218,919.12 × 87,020.85
  4. Step 4: Simplify right side
    158,626.88x = 19,050,527,903.65
  5. Step 5: Solve for x
    x = 19,050,527,903.65/158,626.88
  6. Step 6: Final answer
    x = 120,096.47

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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.