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Finding the Fourth Proportional to 72,792.21, 100,452.94 and 40,961.64

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Solution

The fourth proportional to 72,792.21, 100,452.94 and 40,961.64 is: 56,526.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,792.21 : 100,452.94 = 40,961.64 : x
  2. Step 2: Convert to fraction form
    72,792.21/100,452.94 = 40,961.64/x
  3. Step 3: Cross multiply
    72,792.21x = 100,452.94 × 40,961.64
  4. Step 4: Simplify right side
    72,792.21x = 4,114,717,062.82
  5. Step 5: Solve for x
    x = 4,114,717,062.82/72,792.21
  6. Step 6: Final answer
    x = 56,526.89

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1.5x scale

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.