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Finding the Fourth Proportional to 98,190.46, 135,613.20 and 66,304

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Solution

The fourth proportional to 98,190.46, 135,613.20 and 66,304 is: 91,574.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,190.46 : 135,613.20 = 66,304 : x
  2. Step 2: Convert to fraction form
    98,190.46/135,613.20 = 66,304/x
  3. Step 3: Cross multiply
    98,190.46x = 135,613.20 × 66,304
  4. Step 4: Simplify right side
    98,190.46x = 8,991,697,612.80
  5. Step 5: Solve for x
    x = 8,991,697,612.80/98,190.46
  6. Step 6: Final answer
    x = 91,574.05

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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.