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Finding the Fourth Proportional to 158,879.28, 219,257.04 and 87,264

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Solution

The fourth proportional to 158,879.28, 219,257.04 and 87,264 is: 120,426.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,879.28 : 219,257.04 = 87,264 : x
  2. Step 2: Convert to fraction form
    158,879.28/219,257.04 = 87,264/x
  3. Step 3: Cross multiply
    158,879.28x = 219,257.04 × 87,264
  4. Step 4: Simplify right side
    158,879.28x = 19,133,246,338.56
  5. Step 5: Solve for x
    x = 19,133,246,338.56/158,879.28
  6. Step 6: Final answer
    x = 120,426.32

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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.