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Finding the Fourth Proportional to 65,889.32, 90,940.19 and 51,520.73

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Solution

The fourth proportional to 65,889.32, 90,940.19 and 51,520.73 is: 71,108.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,889.32 : 90,940.19 = 51,520.73 : x
  2. Step 2: Convert to fraction form
    65,889.32/90,940.19 = 51,520.73/x
  3. Step 3: Cross multiply
    65,889.32x = 90,940.19 × 51,520.73
  4. Step 4: Simplify right side
    65,889.32x = 4,685,304,262.83
  5. Step 5: Solve for x
    x = 4,685,304,262.83/65,889.32
  6. Step 6: Final answer
    x = 71,108.71

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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.