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Finding the Fourth Proportional to 90,356, 124,691.28 and 50,612

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Solution

The fourth proportional to 90,356, 124,691.28 and 50,612 is: 69,844.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,356 : 124,691.28 = 50,612 : x
  2. Step 2: Convert to fraction form
    90,356/124,691.28 = 50,612/x
  3. Step 3: Cross multiply
    90,356x = 124,691.28 × 50,612
  4. Step 4: Simplify right side
    90,356x = 6,310,875,063.36
  5. Step 5: Solve for x
    x = 6,310,875,063.36/90,356
  6. Step 6: Final answer
    x = 69,844.56

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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.