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Finding the Fourth Proportional to 74,790.70, 103,209.36 and 42,961.65

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Solution

The fourth proportional to 74,790.70, 103,209.36 and 42,961.65 is: 59,286.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,790.70 : 103,209.36 = 42,961.65 : x
  2. Step 2: Convert to fraction form
    74,790.70/103,209.36 = 42,961.65/x
  3. Step 3: Cross multiply
    74,790.70x = 103,209.36 × 42,961.65
  4. Step 4: Simplify right side
    74,790.70x = 4,434,044,143.02
  5. Step 5: Solve for x
    x = 4,434,044,143.02/74,790.70
  6. Step 6: Final answer
    x = 59,286.03

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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.