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Finding the Fourth Proportional to 72,203.78, 99,671.55 and 43,919.30

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Solution

The fourth proportional to 72,203.78, 99,671.55 and 43,919.30 is: 60,627.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,203.78 : 99,671.55 = 43,919.30 : x
  2. Step 2: Convert to fraction form
    72,203.78/99,671.55 = 43,919.30/x
  3. Step 3: Cross multiply
    72,203.78x = 99,671.55 × 43,919.30
  4. Step 4: Simplify right side
    72,203.78x = 4,377,504,790.40
  5. Step 5: Solve for x
    x = 4,377,504,790.40/72,203.78
  6. Step 6: Final answer
    x = 60,627.08

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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.