Home / 129,282.44-178,405.56-71,921.48

Finding the Fourth Proportional to 129,282.44, 178,405.56 and 71,921.48

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Solution

The fourth proportional to 129,282.44, 178,405.56 and 71,921.48 is: 99,249.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,282.44 : 178,405.56 = 71,921.48 : x
  2. Step 2: Convert to fraction form
    129,282.44/178,405.56 = 71,921.48/x
  3. Step 3: Cross multiply
    129,282.44x = 178,405.56 × 71,921.48
  4. Step 4: Simplify right side
    129,282.44x = 12,831,191,915.43
  5. Step 5: Solve for x
    x = 12,831,191,915.43/129,282.44
  6. Step 6: Final answer
    x = 99,249.30

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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.