Home / 89,611.85-135,016.03-81,073.31

Finding the Fourth Proportional to 89,611.85, 135,016.03 and 81,073.31

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Solution

The fourth proportional to 89,611.85, 135,016.03 and 81,073.31 is: 122,151.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,611.85 : 135,016.03 = 81,073.31 : x
  2. Step 2: Convert to fraction form
    89,611.85/135,016.03 = 81,073.31/x
  3. Step 3: Cross multiply
    89,611.85x = 135,016.03 × 81,073.31
  4. Step 4: Simplify right side
    89,611.85x = 10,946,195,881.42
  5. Step 5: Solve for x
    x = 10,946,195,881.42/89,611.85
  6. Step 6: Final answer
    x = 122,151.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.