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Finding the Fourth Proportional to 112,963.98, 155,891.49 and 61,976.82

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Solution

The fourth proportional to 112,963.98, 155,891.49 and 61,976.82 is: 85,528.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,963.98 : 155,891.49 = 61,976.82 : x
  2. Step 2: Convert to fraction form
    112,963.98/155,891.49 = 61,976.82/x
  3. Step 3: Cross multiply
    112,963.98x = 155,891.49 × 61,976.82
  4. Step 4: Simplify right side
    112,963.98x = 9,661,658,815.26
  5. Step 5: Solve for x
    x = 9,661,658,815.26/112,963.98
  6. Step 6: Final answer
    x = 85,528.67

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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.