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Finding the Fourth Proportional to 66,940.56, 92,367.54 and 38,640.78

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Solution

The fourth proportional to 66,940.56, 92,367.54 and 38,640.78 is: 53,318.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,940.56 : 92,367.54 = 38,640.78 : x
  2. Step 2: Convert to fraction form
    66,940.56/92,367.54 = 38,640.78/x
  3. Step 3: Cross multiply
    66,940.56x = 92,367.54 × 38,640.78
  4. Step 4: Simplify right side
    66,940.56x = 3,569,153,792.28
  5. Step 5: Solve for x
    x = 3,569,153,792.28/66,940.56
  6. Step 6: Final answer
    x = 53,318.25

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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.