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Finding the Fourth Proportional to 121,388, 167,513.76 and 67,677.44

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Solution

The fourth proportional to 121,388, 167,513.76 and 67,677.44 is: 93,393.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,388 : 167,513.76 = 67,677.44 : x
  2. Step 2: Convert to fraction form
    121,388/167,513.76 = 67,677.44/x
  3. Step 3: Cross multiply
    121,388x = 167,513.76 × 67,677.44
  4. Step 4: Simplify right side
    121,388x = 11,336,902,441.57
  5. Step 5: Solve for x
    x = 11,336,902,441.57/121,388
  6. Step 6: Final answer
    x = 93,393.93

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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.