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Finding the Fourth Proportional to 111,705.90, 154,102.76 and 98,972.08

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Solution

The fourth proportional to 111,705.90, 154,102.76 and 98,972.08 is: 136,535.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,705.90 : 154,102.76 = 98,972.08 : x
  2. Step 2: Convert to fraction form
    111,705.90/154,102.76 = 98,972.08/x
  3. Step 3: Cross multiply
    111,705.90x = 154,102.76 × 98,972.08
  4. Step 4: Simplify right side
    111,705.90x = 15,251,870,690.94
  5. Step 5: Solve for x
    x = 15,251,870,690.94/111,705.90
  6. Step 6: Final answer
    x = 136,535.95

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1.5x scale

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.