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Finding the Fourth Proportional to 111,880.38, 154,395.26 and 61,579.38

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Solution

The fourth proportional to 111,880.38, 154,395.26 and 61,579.38 is: 84,979.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,880.38 : 154,395.26 = 61,579.38 : x
  2. Step 2: Convert to fraction form
    111,880.38/154,395.26 = 61,579.38/x
  3. Step 3: Cross multiply
    111,880.38x = 154,395.26 × 61,579.38
  4. Step 4: Simplify right side
    111,880.38x = 9,507,564,385.74
  5. Step 5: Solve for x
    x = 9,507,564,385.74/111,880.38
  6. Step 6: Final answer
    x = 84,979.73

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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.