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Finding the Fourth Proportional to 166,690, 230,032.20 and 91,238.50

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Solution

The fourth proportional to 166,690, 230,032.20 and 91,238.50 is: 125,909.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,690 : 230,032.20 = 91,238.50 : x
  2. Step 2: Convert to fraction form
    166,690/230,032.20 = 91,238.50/x
  3. Step 3: Cross multiply
    166,690x = 230,032.20 × 91,238.50
  4. Step 4: Simplify right side
    166,690x = 20,987,792,879.70
  5. Step 5: Solve for x
    x = 20,987,792,879.70/166,690
  6. Step 6: Final answer
    x = 125,909.13

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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.