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Finding the Fourth Proportional to 72,752.52, 100,398.50 and 40,921.44

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Solution

The fourth proportional to 72,752.52, 100,398.50 and 40,921.44 is: 56,471.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,752.52 : 100,398.50 = 40,921.44 : x
  2. Step 2: Convert to fraction form
    72,752.52/100,398.50 = 40,921.44/x
  3. Step 3: Cross multiply
    72,752.52x = 100,398.50 × 40,921.44
  4. Step 4: Simplify right side
    72,752.52x = 4,108,451,193.84
  5. Step 5: Solve for x
    x = 4,108,451,193.84/72,752.52
  6. Step 6: Final answer
    x = 56,471.60

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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.