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Finding the Fourth Proportional to 72,750.92, 100,395.28 and 40,919.80

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Solution

The fourth proportional to 72,750.92, 100,395.28 and 40,919.80 is: 56,468.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,750.92 : 100,395.28 = 40,919.80 : x
  2. Step 2: Convert to fraction form
    72,750.92/100,395.28 = 40,919.80/x
  3. Step 3: Cross multiply
    72,750.92x = 100,395.28 × 40,919.80
  4. Step 4: Simplify right side
    72,750.92x = 4,108,154,778.54
  5. Step 5: Solve for x
    x = 4,108,154,778.54/72,750.92
  6. Step 6: Final answer
    x = 56,468.77

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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.