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Finding the Fourth Proportional to 67,120.80, 92,619.48 and 38,820.96

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Solution

The fourth proportional to 67,120.80, 92,619.48 and 38,820.96 is: 53,568.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,120.80 : 92,619.48 = 38,820.96 : x
  2. Step 2: Convert to fraction form
    67,120.80/92,619.48 = 38,820.96/x
  3. Step 3: Cross multiply
    67,120.80x = 92,619.48 × 38,820.96
  4. Step 4: Simplify right side
    67,120.80x = 3,595,577,128.30
  5. Step 5: Solve for x
    x = 3,595,577,128.30/67,120.80
  6. Step 6: Final answer
    x = 53,568.75

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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.