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Finding the Fourth Proportional to 60,371.90, 90,537.32 and 20,919.80

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Solution

The fourth proportional to 60,371.90, 90,537.32 and 20,919.80 is: 31,372.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,371.90 : 90,537.32 = 20,919.80 : x
  2. Step 2: Convert to fraction form
    60,371.90/90,537.32 = 20,919.80/x
  3. Step 3: Cross multiply
    60,371.90x = 90,537.32 × 20,919.80
  4. Step 4: Simplify right side
    60,371.90x = 1,894,022,626.94
  5. Step 5: Solve for x
    x = 1,894,022,626.94/60,371.90
  6. Step 6: Final answer
    x = 31,372.59

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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.