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Finding the Fourth Proportional to 159,415.81, 219,986.72 and 91,384.01

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Solution

The fourth proportional to 159,415.81, 219,986.72 and 91,384.01 is: 126,105.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,415.81 : 219,986.72 = 91,384.01 : x
  2. Step 2: Convert to fraction form
    159,415.81/219,986.72 = 91,384.01/x
  3. Step 3: Cross multiply
    159,415.81x = 219,986.72 × 91,384.01
  4. Step 4: Simplify right side
    159,415.81x = 20,103,268,231.13
  5. Step 5: Solve for x
    x = 20,103,268,231.13/159,415.81
  6. Step 6: Final answer
    x = 126,105.86

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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.