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Finding the Fourth Proportional to 90,784.70, 125,286.45 and 54,954.44

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Solution

The fourth proportional to 90,784.70, 125,286.45 and 54,954.44 is: 75,839.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,784.70 : 125,286.45 = 54,954.44 : x
  2. Step 2: Convert to fraction form
    90,784.70/125,286.45 = 54,954.44/x
  3. Step 3: Cross multiply
    90,784.70x = 125,286.45 × 54,954.44
  4. Step 4: Simplify right side
    90,784.70x = 6,885,046,699.34
  5. Step 5: Solve for x
    x = 6,885,046,699.34/90,784.70
  6. Step 6: Final answer
    x = 75,839.28

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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.