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Finding the Fourth Proportional to 111,901.70, 154,431.35 and 61,600.70

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Solution

The fourth proportional to 111,901.70, 154,431.35 and 61,600.70 is: 85,012.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,901.70 : 154,431.35 = 61,600.70 : x
  2. Step 2: Convert to fraction form
    111,901.70/154,431.35 = 61,600.70/x
  3. Step 3: Cross multiply
    111,901.70x = 154,431.35 × 61,600.70
  4. Step 4: Simplify right side
    111,901.70x = 9,513,078,181.78
  5. Step 5: Solve for x
    x = 9,513,078,181.78/111,901.70
  6. Step 6: Final answer
    x = 85,012.82

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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.