Home / 99,931.41-137,905.20-54,609.81

Finding the Fourth Proportional to 99,931.41, 137,905.20 and 54,609.81

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Solution

The fourth proportional to 99,931.41, 137,905.20 and 54,609.81 is: 75,361.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,931.41 : 137,905.20 = 54,609.81 : x
  2. Step 2: Convert to fraction form
    99,931.41/137,905.20 = 54,609.81/x
  3. Step 3: Cross multiply
    99,931.41x = 137,905.20 × 54,609.81
  4. Step 4: Simplify right side
    99,931.41x = 7,530,976,770.01
  5. Step 5: Solve for x
    x = 7,530,976,770.01/99,931.41
  6. Step 6: Final answer
    x = 75,361.46

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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.