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Finding the Fourth Proportional to 111,959.40, 154,518.10 and 64,211.72

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Solution

The fourth proportional to 111,959.40, 154,518.10 and 64,211.72 is: 88,620.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,959.40 : 154,518.10 = 64,211.72 : x
  2. Step 2: Convert to fraction form
    111,959.40/154,518.10 = 64,211.72/x
  3. Step 3: Cross multiply
    111,959.40x = 154,518.10 × 64,211.72
  4. Step 4: Simplify right side
    111,959.40x = 9,921,873,197.90
  5. Step 5: Solve for x
    x = 9,921,873,197.90/111,959.40
  6. Step 6: Final answer
    x = 88,620.28

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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.