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Finding the Fourth Proportional to 66,916.80, 100,343.41 and 38,845.47

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Solution

The fourth proportional to 66,916.80, 100,343.41 and 38,845.47 is: 58,249.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,916.80 : 100,343.41 = 38,845.47 : x
  2. Step 2: Convert to fraction form
    66,916.80/100,343.41 = 38,845.47/x
  3. Step 3: Cross multiply
    66,916.80x = 100,343.41 × 38,845.47
  4. Step 4: Simplify right side
    66,916.80x = 3,897,887,202.03
  5. Step 5: Solve for x
    x = 3,897,887,202.03/66,916.80
  6. Step 6: Final answer
    x = 58,249.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.