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Finding the Fourth Proportional to 111,236.88, 153,528.24 and 86,989.80

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Solution

The fourth proportional to 111,236.88, 153,528.24 and 86,989.80 is: 120,062.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,236.88 : 153,528.24 = 86,989.80 : x
  2. Step 2: Convert to fraction form
    111,236.88/153,528.24 = 86,989.80/x
  3. Step 3: Cross multiply
    111,236.88x = 153,528.24 × 86,989.80
  4. Step 4: Simplify right side
    111,236.88x = 13,355,390,891.95
  5. Step 5: Solve for x
    x = 13,355,390,891.95/111,236.88
  6. Step 6: Final answer
    x = 120,062.62

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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.