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Finding the Fourth Proportional to 65,741.88, 90,718.74 and 38,882.28

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Solution

The fourth proportional to 65,741.88, 90,718.74 and 38,882.28 is: 53,654.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,741.88 : 90,718.74 = 38,882.28 : x
  2. Step 2: Convert to fraction form
    65,741.88/90,718.74 = 38,882.28/x
  3. Step 3: Cross multiply
    65,741.88x = 90,718.74 × 38,882.28
  4. Step 4: Simplify right side
    65,741.88x = 3,527,351,449.93
  5. Step 5: Solve for x
    x = 3,527,351,449.93/65,741.88
  6. Step 6: Final answer
    x = 53,654.56

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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.