Home / 158,721.10-219,038.71-87,105.66

Finding the Fourth Proportional to 158,721.10, 219,038.71 and 87,105.66

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Solution

The fourth proportional to 158,721.10, 219,038.71 and 87,105.66 is: 120,207.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,721.10 : 219,038.71 = 87,105.66 : x
  2. Step 2: Convert to fraction form
    158,721.10/219,038.71 = 87,105.66/x
  3. Step 3: Cross multiply
    158,721.10x = 219,038.71 × 87,105.66
  4. Step 4: Simplify right side
    158,721.10x = 19,079,511,400.10
  5. Step 5: Solve for x
    x = 19,079,511,400.10/158,721.10
  6. Step 6: Final answer
    x = 120,207.78

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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.