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Finding the Fourth Proportional to 98,591.98, 136,169.16 and 66,270.49

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Solution

The fourth proportional to 98,591.98, 136,169.16 and 66,270.49 is: 91,528.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,591.98 : 136,169.16 = 66,270.49 : x
  2. Step 2: Convert to fraction form
    98,591.98/136,169.16 = 66,270.49/x
  3. Step 3: Cross multiply
    98,591.98x = 136,169.16 × 66,270.49
  4. Step 4: Simplify right side
    98,591.98x = 9,023,996,956.09
  5. Step 5: Solve for x
    x = 9,023,996,956.09/98,591.98
  6. Step 6: Final answer
    x = 91,528.71

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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.