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Finding the Fourth Proportional to 90,436, 124,803.20 and 50,151.48

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Solution

The fourth proportional to 90,436, 124,803.20 and 50,151.48 is: 69,209.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,436 : 124,803.20 = 50,151.48 : x
  2. Step 2: Convert to fraction form
    90,436/124,803.20 = 50,151.48/x
  3. Step 3: Cross multiply
    90,436x = 124,803.20 × 50,151.48
  4. Step 4: Simplify right side
    90,436x = 6,259,065,188.74
  5. Step 5: Solve for x
    x = 6,259,065,188.74/90,436
  6. Step 6: Final answer
    x = 69,209.89

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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.