Home / 159,039.20-219,478.24-87,421.12

Finding the Fourth Proportional to 159,039.20, 219,478.24 and 87,421.12

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Solution

The fourth proportional to 159,039.20, 219,478.24 and 87,421.12 is: 120,643.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,039.20 : 219,478.24 = 87,421.12 : x
  2. Step 2: Convert to fraction form
    159,039.20/219,478.24 = 87,421.12/x
  3. Step 3: Cross multiply
    159,039.20x = 219,478.24 × 87,421.12
  4. Step 4: Simplify right side
    159,039.20x = 19,187,033,556.43
  5. Step 5: Solve for x
    x = 19,187,033,556.43/159,039.20
  6. Step 6: Final answer
    x = 120,643.42

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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.