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Finding the Fourth Proportional to 67,321.56, 92,905.62 and 38,643.68

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Solution

The fourth proportional to 67,321.56, 92,905.62 and 38,643.68 is: 53,329.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,321.56 : 92,905.62 = 38,643.68 : x
  2. Step 2: Convert to fraction form
    67,321.56/92,905.62 = 38,643.68/x
  3. Step 3: Cross multiply
    67,321.56x = 92,905.62 × 38,643.68
  4. Step 4: Simplify right side
    67,321.56x = 3,590,215,049.48
  5. Step 5: Solve for x
    x = 3,590,215,049.48/67,321.56
  6. Step 6: Final answer
    x = 53,329.35

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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.