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Finding the Fourth Proportional to 90,520.84, 124,906.01 and 54,213.78

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Solution

The fourth proportional to 90,520.84, 124,906.01 and 54,213.78 is: 74,807.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,520.84 : 124,906.01 = 54,213.78 : x
  2. Step 2: Convert to fraction form
    90,520.84/124,906.01 = 54,213.78/x
  3. Step 3: Cross multiply
    90,520.84x = 124,906.01 × 54,213.78
  4. Step 4: Simplify right side
    90,520.84x = 6,771,626,675.75
  5. Step 5: Solve for x
    x = 6,771,626,675.75/90,520.84
  6. Step 6: Final answer
    x = 74,807.38

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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.