Home / 105,631.38-158,340.39-66,216.12

Finding the Fourth Proportional to 105,631.38, 158,340.39 and 66,216.12

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Solution

The fourth proportional to 105,631.38, 158,340.39 and 66,216.12 is: 99,257.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,631.38 : 158,340.39 = 66,216.12 : x
  2. Step 2: Convert to fraction form
    105,631.38/158,340.39 = 66,216.12/x
  3. Step 3: Cross multiply
    105,631.38x = 158,340.39 × 66,216.12
  4. Step 4: Simplify right side
    105,631.38x = 10,484,686,265.09
  5. Step 5: Solve for x
    x = 10,484,686,265.09/105,631.38
  6. Step 6: Final answer
    x = 99,257.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.