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Finding the Fourth Proportional to 72,494.55, 100,035.78 and 40,657.29

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Solution

The fourth proportional to 72,494.55, 100,035.78 and 40,657.29 is: 56,103.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,494.55 : 100,035.78 = 40,657.29 : x
  2. Step 2: Convert to fraction form
    72,494.55/100,035.78 = 40,657.29/x
  3. Step 3: Cross multiply
    72,494.55x = 100,035.78 × 40,657.29
  4. Step 4: Simplify right side
    72,494.55x = 4,067,183,717.84
  5. Step 5: Solve for x
    x = 4,067,183,717.84/72,494.55
  6. Step 6: Final answer
    x = 56,103.30

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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.