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Finding the Fourth Proportional to 100,786.68, 139,083.48 and 55,462.32

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Solution

The fourth proportional to 100,786.68, 139,083.48 and 55,462.32 is: 76,536.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,786.68 : 139,083.48 = 55,462.32 : x
  2. Step 2: Convert to fraction form
    100,786.68/139,083.48 = 55,462.32/x
  3. Step 3: Cross multiply
    100,786.68x = 139,083.48 × 55,462.32
  4. Step 4: Simplify right side
    100,786.68x = 7,713,892,474.47
  5. Step 5: Solve for x
    x = 7,713,892,474.47/100,786.68
  6. Step 6: Final answer
    x = 76,536.82

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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.