Home / 90,885.28-136,318.20-31,722.10

Finding the Fourth Proportional to 90,885.28, 136,318.20 and 31,722.10

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Solution

The fourth proportional to 90,885.28, 136,318.20 and 31,722.10 is: 47,579.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,885.28 : 136,318.20 = 31,722.10 : x
  2. Step 2: Convert to fraction form
    90,885.28/136,318.20 = 31,722.10/x
  3. Step 3: Cross multiply
    90,885.28x = 136,318.20 × 31,722.10
  4. Step 4: Simplify right side
    90,885.28x = 4,324,299,572.22
  5. Step 5: Solve for x
    x = 4,324,299,572.22/90,885.28
  6. Step 6: Final answer
    x = 47,579.76

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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.