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Finding the Fourth Proportional to 115,814.10, 173,721.15 and 111,221.40

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Solution

The fourth proportional to 115,814.10, 173,721.15 and 111,221.40 is: 166,832.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,814.10 : 173,721.15 = 111,221.40 : x
  2. Step 2: Convert to fraction form
    115,814.10/173,721.15 = 111,221.40/x
  3. Step 3: Cross multiply
    115,814.10x = 173,721.15 × 111,221.40
  4. Step 4: Simplify right side
    115,814.10x = 19,321,509,512.61
  5. Step 5: Solve for x
    x = 19,321,509,512.61/115,814.10
  6. Step 6: Final answer
    x = 166,832.10

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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.