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Finding the Fourth Proportional to 90,881.78, 125,419 and 50,598.25

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Solution

The fourth proportional to 90,881.78, 125,419 and 50,598.25 is: 69,826.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,881.78 : 125,419 = 50,598.25 : x
  2. Step 2: Convert to fraction form
    90,881.78/125,419 = 50,598.25/x
  3. Step 3: Cross multiply
    90,881.78x = 125,419 × 50,598.25
  4. Step 4: Simplify right side
    90,881.78x = 6,345,981,916.75
  5. Step 5: Solve for x
    x = 6,345,981,916.75/90,881.78
  6. Step 6: Final answer
    x = 69,826.78

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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.