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Finding the Fourth Proportional to 66,818.74, 100,243.60 and 19,434.96

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Solution

The fourth proportional to 66,818.74, 100,243.60 and 19,434.96 is: 29,156.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,818.74 : 100,243.60 = 19,434.96 : x
  2. Step 2: Convert to fraction form
    66,818.74/100,243.60 = 19,434.96/x
  3. Step 3: Cross multiply
    66,818.74x = 100,243.60 × 19,434.96
  4. Step 4: Simplify right side
    66,818.74x = 1,948,230,356.26
  5. Step 5: Solve for x
    x = 1,948,230,356.26/66,818.74
  6. Step 6: Final answer
    x = 29,156.95

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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.