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Finding the Fourth Proportional to 112,745.74, 155,583.59 and 61,758.70

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Solution

The fourth proportional to 112,745.74, 155,583.59 and 61,758.70 is: 85,223.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,745.74 : 155,583.59 = 61,758.70 : x
  2. Step 2: Convert to fraction form
    112,745.74/155,583.59 = 61,758.70/x
  3. Step 3: Cross multiply
    112,745.74x = 155,583.59 × 61,758.70
  4. Step 4: Simplify right side
    112,745.74x = 9,608,639,481.82
  5. Step 5: Solve for x
    x = 9,608,639,481.82/112,745.74
  6. Step 6: Final answer
    x = 85,223.97

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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.