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Finding the Fourth Proportional to 72,119.64, 99,524.97 and 43,455.90

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Solution

The fourth proportional to 72,119.64, 99,524.97 and 43,455.90 is: 59,969.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,119.64 : 99,524.97 = 43,455.90 : x
  2. Step 2: Convert to fraction form
    72,119.64/99,524.97 = 43,455.90/x
  3. Step 3: Cross multiply
    72,119.64x = 99,524.97 × 43,455.90
  4. Step 4: Simplify right side
    72,119.64x = 4,324,947,143.82
  5. Step 5: Solve for x
    x = 4,324,947,143.82/72,119.64
  6. Step 6: Final answer
    x = 59,969.06

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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.