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Finding the Fourth Proportional to 98,793, 136,334.34 and 54,081

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Solution

The fourth proportional to 98,793, 136,334.34 and 54,081 is: 74,631.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,793 : 136,334.34 = 54,081 : x
  2. Step 2: Convert to fraction form
    98,793/136,334.34 = 54,081/x
  3. Step 3: Cross multiply
    98,793x = 136,334.34 × 54,081
  4. Step 4: Simplify right side
    98,793x = 7,373,097,441.54
  5. Step 5: Solve for x
    x = 7,373,097,441.54/98,793
  6. Step 6: Final answer
    x = 74,631.78

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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.