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Finding the Fourth Proportional to 159,379.65, 219,939.50 and 86,783.81

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Solution

The fourth proportional to 159,379.65, 219,939.50 and 86,783.81 is: 119,759.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,379.65 : 219,939.50 = 86,783.81 : x
  2. Step 2: Convert to fraction form
    159,379.65/219,939.50 = 86,783.81/x
  3. Step 3: Cross multiply
    159,379.65x = 219,939.50 × 86,783.81
  4. Step 4: Simplify right side
    159,379.65x = 19,087,186,896.76
  5. Step 5: Solve for x
    x = 19,087,186,896.76/159,379.65
  6. Step 6: Final answer
    x = 119,759.25

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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.