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Finding the Fourth Proportional to 67,321.76, 92,889.06 and 38,639.66

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Solution

The fourth proportional to 67,321.76, 92,889.06 and 38,639.66 is: 53,314.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,321.76 : 92,889.06 = 38,639.66 : x
  2. Step 2: Convert to fraction form
    67,321.76/92,889.06 = 38,639.66/x
  3. Step 3: Cross multiply
    67,321.76x = 92,889.06 × 38,639.66
  4. Step 4: Simplify right side
    67,321.76x = 3,589,201,696.12
  5. Step 5: Solve for x
    x = 3,589,201,696.12/67,321.76
  6. Step 6: Final answer
    x = 53,314.14

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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.