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Finding the Fourth Proportional to 65,920.25, 90,969.39 and 35,704.86

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Solution

The fourth proportional to 65,920.25, 90,969.39 and 35,704.86 is: 49,272.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,920.25 : 90,969.39 = 35,704.86 : x
  2. Step 2: Convert to fraction form
    65,920.25/90,969.39 = 35,704.86/x
  3. Step 3: Cross multiply
    65,920.25x = 90,969.39 × 35,704.86
  4. Step 4: Simplify right side
    65,920.25x = 3,248,049,334.24
  5. Step 5: Solve for x
    x = 3,248,049,334.24/65,920.25
  6. Step 6: Final answer
    x = 49,272.41

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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.