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Finding the Fourth Proportional to 159,381.65, 219,942.26 and 86,785.81

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Solution

The fourth proportional to 159,381.65, 219,942.26 and 86,785.81 is: 119,762.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,381.65 : 219,942.26 = 86,785.81 : x
  2. Step 2: Convert to fraction form
    159,381.65/219,942.26 = 86,785.81/x
  3. Step 3: Cross multiply
    159,381.65x = 219,942.26 × 86,785.81
  4. Step 4: Simplify right side
    159,381.65x = 19,087,867,187.33
  5. Step 5: Solve for x
    x = 19,087,867,187.33/159,381.65
  6. Step 6: Final answer
    x = 119,762.01

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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.