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Finding the Fourth Proportional to 67,268.31, 92,830.28 and 38,990.40

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Solution

The fourth proportional to 67,268.31, 92,830.28 and 38,990.40 is: 53,806.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,268.31 : 92,830.28 = 38,990.40 : x
  2. Step 2: Convert to fraction form
    67,268.31/92,830.28 = 38,990.40/x
  3. Step 3: Cross multiply
    67,268.31x = 92,830.28 × 38,990.40
  4. Step 4: Simplify right side
    67,268.31x = 3,619,489,749.31
  5. Step 5: Solve for x
    x = 3,619,489,749.31/67,268.31
  6. Step 6: Final answer
    x = 53,806.76

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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.