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Finding the Fourth Proportional to 115,029.71, 158,726.73 and 66,631.02

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Solution

The fourth proportional to 115,029.71, 158,726.73 and 66,631.02 is: 91,942.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,029.71 : 158,726.73 = 66,631.02 : x
  2. Step 2: Convert to fraction form
    115,029.71/158,726.73 = 66,631.02/x
  3. Step 3: Cross multiply
    115,029.71x = 158,726.73 × 66,631.02
  4. Step 4: Simplify right side
    115,029.71x = 10,576,123,921.16
  5. Step 5: Solve for x
    x = 10,576,123,921.16/115,029.71
  6. Step 6: Final answer
    x = 91,942.55

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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.