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Finding the Fourth Proportional to 98,190.72, 135,460.08 and 66,348

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Solution

The fourth proportional to 98,190.72, 135,460.08 and 66,348 is: 91,531.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,190.72 : 135,460.08 = 66,348 : x
  2. Step 2: Convert to fraction form
    98,190.72/135,460.08 = 66,348/x
  3. Step 3: Cross multiply
    98,190.72x = 135,460.08 × 66,348
  4. Step 4: Simplify right side
    98,190.72x = 8,987,505,387.84
  5. Step 5: Solve for x
    x = 8,987,505,387.84/98,190.72
  6. Step 6: Final answer
    x = 91,531.11

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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.