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Finding the Fourth Proportional to 111,685.67, 154,162.14 and 71,507.65

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Solution

The fourth proportional to 111,685.67, 154,162.14 and 71,507.65 is: 98,703.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,685.67 : 154,162.14 = 71,507.65 : x
  2. Step 2: Convert to fraction form
    111,685.67/154,162.14 = 71,507.65/x
  3. Step 3: Cross multiply
    111,685.67x = 154,162.14 × 71,507.65
  4. Step 4: Simplify right side
    111,685.67x = 11,023,772,350.37
  5. Step 5: Solve for x
    x = 11,023,772,350.37/111,685.67
  6. Step 6: Final answer
    x = 98,703.55

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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.