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Finding the Fourth Proportional to 111,976.91, 154,528.13 and 61,675.91

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Solution

The fourth proportional to 111,976.91, 154,528.13 and 61,675.91 is: 85,112.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,976.91 : 154,528.13 = 61,675.91 : x
  2. Step 2: Convert to fraction form
    111,976.91/154,528.13 = 61,675.91/x
  3. Step 3: Cross multiply
    111,976.91x = 154,528.13 × 61,675.91
  4. Step 4: Simplify right side
    111,976.91x = 9,530,663,038.35
  5. Step 5: Solve for x
    x = 9,530,663,038.35/111,976.91
  6. Step 6: Final answer
    x = 85,112.75

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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.