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Finding the Fourth Proportional to 158,771.92, 219,108 and 87,158.56

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Solution

The fourth proportional to 158,771.92, 219,108 and 87,158.56 is: 120,280.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,771.92 : 219,108 = 87,158.56 : x
  2. Step 2: Convert to fraction form
    158,771.92/219,108 = 87,158.56/x
  3. Step 3: Cross multiply
    158,771.92x = 219,108 × 87,158.56
  4. Step 4: Simplify right side
    158,771.92x = 19,097,137,764.48
  5. Step 5: Solve for x
    x = 19,097,137,764.48/158,771.92
  6. Step 6: Final answer
    x = 120,280.32

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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.