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Finding the Fourth Proportional to 121,040, 167,035.20 and 68,048

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Solution

The fourth proportional to 121,040, 167,035.20 and 68,048 is: 93,906.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,040 : 167,035.20 = 68,048 : x
  2. Step 2: Convert to fraction form
    121,040/167,035.20 = 68,048/x
  3. Step 3: Cross multiply
    121,040x = 167,035.20 × 68,048
  4. Step 4: Simplify right side
    121,040x = 11,366,411,289.60
  5. Step 5: Solve for x
    x = 11,366,411,289.60/121,040
  6. Step 6: Final answer
    x = 93,906.24

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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.