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Finding the Fourth Proportional to 159,435.65, 220,022.69 and 87,815.93

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Solution

The fourth proportional to 159,435.65, 220,022.69 and 87,815.93 is: 121,186.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,435.65 : 220,022.69 = 87,815.93 : x
  2. Step 2: Convert to fraction form
    159,435.65/220,022.69 = 87,815.93/x
  3. Step 3: Cross multiply
    159,435.65x = 220,022.69 × 87,815.93
  4. Step 4: Simplify right side
    159,435.65x = 19,321,496,704.37
  5. Step 5: Solve for x
    x = 19,321,496,704.37/159,435.65
  6. Step 6: Final answer
    x = 121,186.80

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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.