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Finding the Fourth Proportional to 90,489.70, 124,876.48 and 49,653.56

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Solution

The fourth proportional to 90,489.70, 124,876.48 and 49,653.56 is: 68,522.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,489.70 : 124,876.48 = 49,653.56 : x
  2. Step 2: Convert to fraction form
    90,489.70/124,876.48 = 49,653.56/x
  3. Step 3: Cross multiply
    90,489.70x = 124,876.48 × 49,653.56
  4. Step 4: Simplify right side
    90,489.70x = 6,200,561,792.27
  5. Step 5: Solve for x
    x = 6,200,561,792.27/90,489.70
  6. Step 6: Final answer
    x = 68,522.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.