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Finding the Fourth Proportional to 111,765.75, 154,242.78 and 64,017.45

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Solution

The fourth proportional to 111,765.75, 154,242.78 and 64,017.45 is: 88,347.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,765.75 : 154,242.78 = 64,017.45 : x
  2. Step 2: Convert to fraction form
    111,765.75/154,242.78 = 64,017.45/x
  3. Step 3: Cross multiply
    111,765.75x = 154,242.78 × 64,017.45
  4. Step 4: Simplify right side
    111,765.75x = 9,874,229,456.51
  5. Step 5: Solve for x
    x = 9,874,229,456.51/111,765.75
  6. Step 6: Final answer
    x = 88,347.54

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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.