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Finding the Fourth Proportional to 74,855.88, 103,299.57 and 40,865.04

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Solution

The fourth proportional to 74,855.88, 103,299.57 and 40,865.04 is: 56,392.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,855.88 : 103,299.57 = 40,865.04 : x
  2. Step 2: Convert to fraction form
    74,855.88/103,299.57 = 40,865.04/x
  3. Step 3: Cross multiply
    74,855.88x = 103,299.57 × 40,865.04
  4. Step 4: Simplify right side
    74,855.88x = 4,221,341,060.03
  5. Step 5: Solve for x
    x = 4,221,341,060.03/74,855.88
  6. Step 6: Final answer
    x = 56,392.91

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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.