Home / 118,971.12-178,236-85,167.36

Finding the Fourth Proportional to 118,971.12, 178,236 and 85,167.36

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Solution

The fourth proportional to 118,971.12, 178,236 and 85,167.36 is: 127,593.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,971.12 : 178,236 = 85,167.36 : x
  2. Step 2: Convert to fraction form
    118,971.12/178,236 = 85,167.36/x
  3. Step 3: Cross multiply
    118,971.12x = 178,236 × 85,167.36
  4. Step 4: Simplify right side
    118,971.12x = 15,179,889,576.96
  5. Step 5: Solve for x
    x = 15,179,889,576.96/118,971.12
  6. Step 6: Final answer
    x = 127,593.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.