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Finding the Fourth Proportional to 111,977.29, 154,528.65 and 61,676.29

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Solution

The fourth proportional to 111,977.29, 154,528.65 and 61,676.29 is: 85,113.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,977.29 : 154,528.65 = 61,676.29 : x
  2. Step 2: Convert to fraction form
    111,977.29/154,528.65 = 61,676.29/x
  3. Step 3: Cross multiply
    111,977.29x = 154,528.65 × 61,676.29
  4. Step 4: Simplify right side
    111,977.29x = 9,530,752,903.87
  5. Step 5: Solve for x
    x = 9,530,752,903.87/111,977.29
  6. Step 6: Final answer
    x = 85,113.27

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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.