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Finding the Fourth Proportional to 86,873.31, 119,823.38 and 79,726.31

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Solution

The fourth proportional to 86,873.31, 119,823.38 and 79,726.31 is: 109,965.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,873.31 : 119,823.38 = 79,726.31 : x
  2. Step 2: Convert to fraction form
    86,873.31/119,823.38 = 79,726.31/x
  3. Step 3: Cross multiply
    86,873.31x = 119,823.38 × 79,726.31
  4. Step 4: Simplify right side
    86,873.31x = 9,553,074,941.38
  5. Step 5: Solve for x
    x = 9,553,074,941.38/86,873.31
  6. Step 6: Final answer
    x = 109,965.59

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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.