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Finding the Fourth Proportional to 66,897.26, 100,340.65 and 18,863.93

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Solution

The fourth proportional to 66,897.26, 100,340.65 and 18,863.93 is: 28,294.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,897.26 : 100,340.65 = 18,863.93 : x
  2. Step 2: Convert to fraction form
    66,897.26/100,340.65 = 18,863.93/x
  3. Step 3: Cross multiply
    66,897.26x = 100,340.65 × 18,863.93
  4. Step 4: Simplify right side
    66,897.26x = 1,892,818,519.63
  5. Step 5: Solve for x
    x = 1,892,818,519.63/66,897.26
  6. Step 6: Final answer
    x = 28,294.41

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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.