Home / 72,238.64-99,687.11-40,407.66

Finding the Fourth Proportional to 72,238.64, 99,687.11 and 40,407.66

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Solution

The fourth proportional to 72,238.64, 99,687.11 and 40,407.66 is: 55,761.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,238.64 : 99,687.11 = 40,407.66 : x
  2. Step 2: Convert to fraction form
    72,238.64/99,687.11 = 40,407.66/x
  3. Step 3: Cross multiply
    72,238.64x = 99,687.11 × 40,407.66
  4. Step 4: Simplify right side
    72,238.64x = 4,028,122,645.22
  5. Step 5: Solve for x
    x = 4,028,122,645.22/72,238.64
  6. Step 6: Final answer
    x = 55,761.33

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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.