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Finding the Fourth Proportional to 111,920.60, 154,423.83 and 63,511.76

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Solution

The fourth proportional to 111,920.60, 154,423.83 and 63,511.76 is: 87,631.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,920.60 : 154,423.83 = 63,511.76 : x
  2. Step 2: Convert to fraction form
    111,920.60/154,423.83 = 63,511.76/x
  3. Step 3: Cross multiply
    111,920.60x = 154,423.83 × 63,511.76
  4. Step 4: Simplify right side
    111,920.60x = 9,807,729,853.47
  5. Step 5: Solve for x
    x = 9,807,729,853.47/111,920.60
  6. Step 6: Final answer
    x = 87,631.14

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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.