Home / 90,456.32-135,487.20-55,289.36

Finding the Fourth Proportional to 90,456.32, 135,487.20 and 55,289.36

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Solution

The fourth proportional to 90,456.32, 135,487.20 and 55,289.36 is: 82,813.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,456.32 : 135,487.20 = 55,289.36 : x
  2. Step 2: Convert to fraction form
    90,456.32/135,487.20 = 55,289.36/x
  3. Step 3: Cross multiply
    90,456.32x = 135,487.20 × 55,289.36
  4. Step 4: Simplify right side
    90,456.32x = 7,491,000,576.19
  5. Step 5: Solve for x
    x = 7,491,000,576.19/90,456.32
  6. Step 6: Final answer
    x = 82,813.46

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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.