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Finding the Fourth Proportional to 72,629.96, 100,223.88 and 40,792.64

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Solution

The fourth proportional to 72,629.96, 100,223.88 and 40,792.64 is: 56,290.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,629.96 : 100,223.88 = 40,792.64 : x
  2. Step 2: Convert to fraction form
    72,629.96/100,223.88 = 40,792.64/x
  3. Step 3: Cross multiply
    72,629.96x = 100,223.88 × 40,792.64
  4. Step 4: Simplify right side
    72,629.96x = 4,088,396,656.24
  5. Step 5: Solve for x
    x = 4,088,396,656.24/72,629.96
  6. Step 6: Final answer
    x = 56,290.77

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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.