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Finding the Fourth Proportional to 111,957.70, 154,494.62 and 61,656.70

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Solution

The fourth proportional to 111,957.70, 154,494.62 and 61,656.70 is: 85,082.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,957.70 : 154,494.62 = 61,656.70 : x
  2. Step 2: Convert to fraction form
    111,957.70/154,494.62 = 61,656.70/x
  3. Step 3: Cross multiply
    111,957.70x = 154,494.62 × 61,656.70
  4. Step 4: Simplify right side
    111,957.70x = 9,525,627,742.43
  5. Step 5: Solve for x
    x = 9,525,627,742.43/111,957.70
  6. Step 6: Final answer
    x = 85,082.38

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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.