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Finding the Fourth Proportional to 72,227.84, 99,679.03 and 40,396.98

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Solution

The fourth proportional to 72,227.84, 99,679.03 and 40,396.98 is: 55,750.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,227.84 : 99,679.03 = 40,396.98 : x
  2. Step 2: Convert to fraction form
    72,227.84/99,679.03 = 40,396.98/x
  3. Step 3: Cross multiply
    72,227.84x = 99,679.03 × 40,396.98
  4. Step 4: Simplify right side
    72,227.84x = 4,026,731,781.33
  5. Step 5: Solve for x
    x = 4,026,731,781.33/72,227.84
  6. Step 6: Final answer
    x = 55,750.41

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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.