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Finding the Fourth Proportional to 66,898.26, 100,342.15 and 18,864.93

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Solution

The fourth proportional to 66,898.26, 100,342.15 and 18,864.93 is: 28,295.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,898.26 : 100,342.15 = 18,864.93 : x
  2. Step 2: Convert to fraction form
    66,898.26/100,342.15 = 18,864.93/x
  3. Step 3: Cross multiply
    66,898.26x = 100,342.15 × 18,864.93
  4. Step 4: Simplify right side
    66,898.26x = 1,892,947,635.80
  5. Step 5: Solve for x
    x = 1,892,947,635.80/66,898.26
  6. Step 6: Final answer
    x = 28,295.92

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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.