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Finding the Fourth Proportional to 90,371, 124,711.20 and 50,087

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Solution

The fourth proportional to 90,371, 124,711.20 and 50,087 is: 69,119.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,371 : 124,711.20 = 50,087 : x
  2. Step 2: Convert to fraction form
    90,371/124,711.20 = 50,087/x
  3. Step 3: Cross multiply
    90,371x = 124,711.20 × 50,087
  4. Step 4: Simplify right side
    90,371x = 6,246,409,874.40
  5. Step 5: Solve for x
    x = 6,246,409,874.40/90,371
  6. Step 6: Final answer
    x = 69,119.63

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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.