Home / 159,128.46-219,589.02-87,506.64

Finding the Fourth Proportional to 159,128.46, 219,589.02 and 87,506.64

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Solution

The fourth proportional to 159,128.46, 219,589.02 and 87,506.64 is: 120,754.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,128.46 : 219,589.02 = 87,506.64 : x
  2. Step 2: Convert to fraction form
    159,128.46/219,589.02 = 87,506.64/x
  3. Step 3: Cross multiply
    159,128.46x = 219,589.02 × 87,506.64
  4. Step 4: Simplify right side
    159,128.46x = 19,215,497,321.09
  5. Step 5: Solve for x
    x = 19,215,497,321.09/159,128.46
  6. Step 6: Final answer
    x = 120,754.62

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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.