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Finding the Fourth Proportional to 65,658.28, 90,604.70 and 38,803.29

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Solution

The fourth proportional to 65,658.28, 90,604.70 and 38,803.29 is: 53,546.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,658.28 : 90,604.70 = 38,803.29 : x
  2. Step 2: Convert to fraction form
    65,658.28/90,604.70 = 38,803.29/x
  3. Step 3: Cross multiply
    65,658.28x = 90,604.70 × 38,803.29
  4. Step 4: Simplify right side
    65,658.28x = 3,515,760,449.46
  5. Step 5: Solve for x
    x = 3,515,760,449.46/65,658.28
  6. Step 6: Final answer
    x = 53,546.34

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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.