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Finding the Fourth Proportional to 98,618.32, 136,094.12 and 91,084.08

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Solution

The fourth proportional to 98,618.32, 136,094.12 and 91,084.08 is: 125,696.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,618.32 : 136,094.12 = 91,084.08 : x
  2. Step 2: Convert to fraction form
    98,618.32/136,094.12 = 91,084.08/x
  3. Step 3: Cross multiply
    98,618.32x = 136,094.12 × 91,084.08
  4. Step 4: Simplify right side
    98,618.32x = 12,396,007,713.61
  5. Step 5: Solve for x
    x = 12,396,007,713.61/98,618.32
  6. Step 6: Final answer
    x = 125,696.80

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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.