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Finding the Fourth Proportional to 90,499.88, 124,887.93 and 50,212.78

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Solution

The fourth proportional to 90,499.88, 124,887.93 and 50,212.78 is: 69,292.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,499.88 : 124,887.93 = 50,212.78 : x
  2. Step 2: Convert to fraction form
    90,499.88/124,887.93 = 50,212.78/x
  3. Step 3: Cross multiply
    90,499.88x = 124,887.93 × 50,212.78
  4. Step 4: Simplify right side
    90,499.88x = 6,270,969,841.53
  5. Step 5: Solve for x
    x = 6,270,969,841.53/90,499.88
  6. Step 6: Final answer
    x = 69,292.57

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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.