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Finding the Fourth Proportional to 100,744.66, 139,027.92 and 55,425.58

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Solution

The fourth proportional to 100,744.66, 139,027.92 and 55,425.58 is: 76,487.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,744.66 : 139,027.92 = 55,425.58 : x
  2. Step 2: Convert to fraction form
    100,744.66/139,027.92 = 55,425.58/x
  3. Step 3: Cross multiply
    100,744.66x = 139,027.92 × 55,425.58
  4. Step 4: Simplify right side
    100,744.66x = 7,705,703,102.19
  5. Step 5: Solve for x
    x = 7,705,703,102.19/100,744.66
  6. Step 6: Final answer
    x = 76,487.46

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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.