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Finding the Fourth Proportional to 72,297.88, 99,770.97 and 40,472.89

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Solution

The fourth proportional to 72,297.88, 99,770.97 and 40,472.89 is: 55,852.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,297.88 : 99,770.97 = 40,472.89 : x
  2. Step 2: Convert to fraction form
    72,297.88/99,770.97 = 40,472.89/x
  3. Step 3: Cross multiply
    72,297.88x = 99,770.97 × 40,472.89
  4. Step 4: Simplify right side
    72,297.88x = 4,038,019,494.00
  5. Step 5: Solve for x
    x = 4,038,019,494.00/72,297.88
  6. Step 6: Final answer
    x = 55,852.53

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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.