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Finding the Fourth Proportional to 66,940.81, 92,377.79 and 38,662.09

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Solution

The fourth proportional to 66,940.81, 92,377.79 and 38,662.09 is: 53,353.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,940.81 : 92,377.79 = 38,662.09 : x
  2. Step 2: Convert to fraction form
    66,940.81/92,377.79 = 38,662.09/x
  3. Step 3: Cross multiply
    66,940.81x = 92,377.79 × 38,662.09
  4. Step 4: Simplify right side
    66,940.81x = 3,571,518,430.98
  5. Step 5: Solve for x
    x = 3,571,518,430.98/66,940.81
  6. Step 6: Final answer
    x = 53,353.38

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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.