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Finding the Fourth Proportional to 163,978.36, 226,301.90 and 91,386.14

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Solution

The fourth proportional to 163,978.36, 226,301.90 and 91,386.14 is: 126,119.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,978.36 : 226,301.90 = 91,386.14 : x
  2. Step 2: Convert to fraction form
    163,978.36/226,301.90 = 91,386.14/x
  3. Step 3: Cross multiply
    163,978.36x = 226,301.90 × 91,386.14
  4. Step 4: Simplify right side
    163,978.36x = 20,680,857,115.67
  5. Step 5: Solve for x
    x = 20,680,857,115.67/163,978.36
  6. Step 6: Final answer
    x = 126,119.43

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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.