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Finding the Fourth Proportional to 74,855.21, 103,295.79 and 40,856.94

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Solution

The fourth proportional to 74,855.21, 103,295.79 and 40,856.94 is: 56,380.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,855.21 : 103,295.79 = 40,856.94 : x
  2. Step 2: Convert to fraction form
    74,855.21/103,295.79 = 40,856.94/x
  3. Step 3: Cross multiply
    74,855.21x = 103,295.79 × 40,856.94
  4. Step 4: Simplify right side
    74,855.21x = 4,220,349,894.28
  5. Step 5: Solve for x
    x = 4,220,349,894.28/74,855.21
  6. Step 6: Final answer
    x = 56,380.18

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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.