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Finding the Fourth Proportional to 72,237.75, 99,682.65 and 40,400.49

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Solution

The fourth proportional to 72,237.75, 99,682.65 and 40,400.49 is: 55,749.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,237.75 : 99,682.65 = 40,400.49 : x
  2. Step 2: Convert to fraction form
    72,237.75/99,682.65 = 40,400.49/x
  3. Step 3: Cross multiply
    72,237.75x = 99,682.65 × 40,400.49
  4. Step 4: Simplify right side
    72,237.75x = 4,027,227,904.50
  5. Step 5: Solve for x
    x = 4,027,227,904.50/72,237.75
  6. Step 6: Final answer
    x = 55,749.63

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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.