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Finding the Fourth Proportional to 159,696.77, 220,381.76 and 87,099.91

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Solution

The fourth proportional to 159,696.77, 220,381.76 and 87,099.91 is: 120,198.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,696.77 : 220,381.76 = 87,099.91 : x
  2. Step 2: Convert to fraction form
    159,696.77/220,381.76 = 87,099.91/x
  3. Step 3: Cross multiply
    159,696.77x = 220,381.76 × 87,099.91
  4. Step 4: Simplify right side
    159,696.77x = 19,195,231,128.44
  5. Step 5: Solve for x
    x = 19,195,231,128.44/159,696.77
  6. Step 6: Final answer
    x = 120,198.00

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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.