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Finding the Fourth Proportional to 66,377.34, 99,550.30 and 18,990.98

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Solution

The fourth proportional to 66,377.34, 99,550.30 and 18,990.98 is: 28,481.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,377.34 : 99,550.30 = 18,990.98 : x
  2. Step 2: Convert to fraction form
    66,377.34/99,550.30 = 18,990.98/x
  3. Step 3: Cross multiply
    66,377.34x = 99,550.30 × 18,990.98
  4. Step 4: Simplify right side
    66,377.34x = 1,890,557,756.29
  5. Step 5: Solve for x
    x = 1,890,557,756.29/66,377.34
  6. Step 6: Final answer
    x = 28,481.98

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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.