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Finding the Fourth Proportional to 66,891.36, 92,302.56 and 38,606.40

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Solution

The fourth proportional to 66,891.36, 92,302.56 and 38,606.40 is: 53,272.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,891.36 : 92,302.56 = 38,606.40 : x
  2. Step 2: Convert to fraction form
    66,891.36/92,302.56 = 38,606.40/x
  3. Step 3: Cross multiply
    66,891.36x = 92,302.56 × 38,606.40
  4. Step 4: Simplify right side
    66,891.36x = 3,563,469,552.38
  5. Step 5: Solve for x
    x = 3,563,469,552.38/66,891.36
  6. Step 6: Final answer
    x = 53,272.49

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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.