Home / 90,308.64-135,471.90-31,136.52

Finding the Fourth Proportional to 90,308.64, 135,471.90 and 31,136.52

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Solution

The fourth proportional to 90,308.64, 135,471.90 and 31,136.52 is: 46,707.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,308.64 : 135,471.90 = 31,136.52 : x
  2. Step 2: Convert to fraction form
    90,308.64/135,471.90 = 31,136.52/x
  3. Step 3: Cross multiply
    90,308.64x = 135,471.90 × 31,136.52
  4. Step 4: Simplify right side
    90,308.64x = 4,218,123,523.79
  5. Step 5: Solve for x
    x = 4,218,123,523.79/90,308.64
  6. Step 6: Final answer
    x = 46,707.86

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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.