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Finding the Fourth Proportional to 72,792.91, 100,455.75 and 40,961.80

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Solution

The fourth proportional to 72,792.91, 100,455.75 and 40,961.80 is: 56,528.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,792.91 : 100,455.75 = 40,961.80 : x
  2. Step 2: Convert to fraction form
    72,792.91/100,455.75 = 40,961.80/x
  3. Step 3: Cross multiply
    72,792.91x = 100,455.75 × 40,961.80
  4. Step 4: Simplify right side
    72,792.91x = 4,114,848,340.35
  5. Step 5: Solve for x
    x = 4,114,848,340.35/72,792.91
  6. Step 6: Final answer
    x = 56,528.15

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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.