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Finding the Fourth Proportional to 90,122.59, 124,369.99 and 49,839.06

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Solution

The fourth proportional to 90,122.59, 124,369.99 and 49,839.06 is: 68,778.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,122.59 : 124,369.99 = 49,839.06 : x
  2. Step 2: Convert to fraction form
    90,122.59/124,369.99 = 49,839.06/x
  3. Step 3: Cross multiply
    90,122.59x = 124,369.99 × 49,839.06
  4. Step 4: Simplify right side
    90,122.59x = 6,198,483,735.60
  5. Step 5: Solve for x
    x = 6,198,483,735.60/90,122.59
  6. Step 6: Final answer
    x = 68,778.36

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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.