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Finding the Fourth Proportional to 98,420.92, 135,713.60 and 66,534.46

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Solution

The fourth proportional to 98,420.92, 135,713.60 and 66,534.46 is: 91,745.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,420.92 : 135,713.60 = 66,534.46 : x
  2. Step 2: Convert to fraction form
    98,420.92/135,713.60 = 66,534.46/x
  3. Step 3: Cross multiply
    98,420.92x = 135,713.60 × 66,534.46
  4. Step 4: Simplify right side
    98,420.92x = 9,029,631,618.72
  5. Step 5: Solve for x
    x = 9,029,631,618.72/98,420.92
  6. Step 6: Final answer
    x = 91,745.04

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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.