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Finding the Fourth Proportional to 112,757, 155,604.66 and 68,045

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Solution

The fourth proportional to 112,757, 155,604.66 and 68,045 is: 93,902.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,757 : 155,604.66 = 68,045 : x
  2. Step 2: Convert to fraction form
    112,757/155,604.66 = 68,045/x
  3. Step 3: Cross multiply
    112,757x = 155,604.66 × 68,045
  4. Step 4: Simplify right side
    112,757x = 10,588,119,089.70
  5. Step 5: Solve for x
    x = 10,588,119,089.70/112,757
  6. Step 6: Final answer
    x = 93,902.10

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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.