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Finding the Fourth Proportional to 72,563.28, 100,137.66 and 40,298.28

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Solution

The fourth proportional to 72,563.28, 100,137.66 and 40,298.28 is: 55,611.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,563.28 : 100,137.66 = 40,298.28 : x
  2. Step 2: Convert to fraction form
    72,563.28/100,137.66 = 40,298.28/x
  3. Step 3: Cross multiply
    72,563.28x = 100,137.66 × 40,298.28
  4. Step 4: Simplify right side
    72,563.28x = 4,035,375,461.22
  5. Step 5: Solve for x
    x = 4,035,375,461.22/72,563.28
  6. Step 6: Final answer
    x = 55,611.81

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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.