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Finding the Fourth Proportional to 65,732.74, 90,729.75 and 38,884.57

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Solution

The fourth proportional to 65,732.74, 90,729.75 and 38,884.57 is: 53,671.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,732.74 : 90,729.75 = 38,884.57 : x
  2. Step 2: Convert to fraction form
    65,732.74/90,729.75 = 38,884.57/x
  3. Step 3: Cross multiply
    65,732.74x = 90,729.75 × 38,884.57
  4. Step 4: Simplify right side
    65,732.74x = 3,527,987,314.96
  5. Step 5: Solve for x
    x = 3,527,987,314.96/65,732.74
  6. Step 6: Final answer
    x = 53,671.69

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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.