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Finding the Fourth Proportional to 111,977.28, 154,528.62 and 61,676.28

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Solution

The fourth proportional to 111,977.28, 154,528.62 and 61,676.28 is: 85,113.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,977.28 : 154,528.62 = 61,676.28 : x
  2. Step 2: Convert to fraction form
    111,977.28/154,528.62 = 61,676.28/x
  3. Step 3: Cross multiply
    111,977.28x = 154,528.62 × 61,676.28
  4. Step 4: Simplify right side
    111,977.28x = 9,530,750,435.13
  5. Step 5: Solve for x
    x = 9,530,750,435.13/111,977.28
  6. Step 6: Final answer
    x = 85,113.25

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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.