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Finding the Fourth Proportional to 121,937.73, 168,280.61 and 68,219.54

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Solution

The fourth proportional to 121,937.73, 168,280.61 and 68,219.54 is: 94,146.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,937.73 : 168,280.61 = 68,219.54 : x
  2. Step 2: Convert to fraction form
    121,937.73/168,280.61 = 68,219.54/x
  3. Step 3: Cross multiply
    121,937.73x = 168,280.61 × 68,219.54
  4. Step 4: Simplify right side
    121,937.73x = 11,480,024,622.62
  5. Step 5: Solve for x
    x = 11,480,024,622.62/121,937.73
  6. Step 6: Final answer
    x = 94,146.62

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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.