Home / 85,138.76-127,511.30-82,186.31

Finding the Fourth Proportional to 85,138.76, 127,511.30 and 82,186.31

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Solution

The fourth proportional to 85,138.76, 127,511.30 and 82,186.31 is: 123,089.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,138.76 : 127,511.30 = 82,186.31 : x
  2. Step 2: Convert to fraction form
    85,138.76/127,511.30 = 82,186.31/x
  3. Step 3: Cross multiply
    85,138.76x = 127,511.30 × 82,186.31
  4. Step 4: Simplify right side
    85,138.76x = 10,479,683,230.30
  5. Step 5: Solve for x
    x = 10,479,683,230.30/85,138.76
  6. Step 6: Final answer
    x = 123,089.45

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1.5x scale

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.