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Finding the Fourth Proportional to 158,811.99, 219,147.46 and 87,189.54

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Solution

The fourth proportional to 158,811.99, 219,147.46 and 87,189.54 is: 120,314.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,811.99 : 219,147.46 = 87,189.54 : x
  2. Step 2: Convert to fraction form
    158,811.99/219,147.46 = 87,189.54/x
  3. Step 3: Cross multiply
    158,811.99x = 219,147.46 × 87,189.54
  4. Step 4: Simplify right side
    158,811.99x = 19,107,366,229.57
  5. Step 5: Solve for x
    x = 19,107,366,229.57/158,811.99
  6. Step 6: Final answer
    x = 120,314.38

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1.5x scale

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.