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Finding the Fourth Proportional to 112,708.74, 155,493 and 67,369.98

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Solution

The fourth proportional to 112,708.74, 155,493 and 67,369.98 is: 92,943.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,708.74 : 155,493 = 67,369.98 : x
  2. Step 2: Convert to fraction form
    112,708.74/155,493 = 67,369.98/x
  3. Step 3: Cross multiply
    112,708.74x = 155,493 × 67,369.98
  4. Step 4: Simplify right side
    112,708.74x = 10,475,560,300.14
  5. Step 5: Solve for x
    x = 10,475,560,300.14/112,708.74
  6. Step 6: Final answer
    x = 92,943.64

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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.