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Finding the Fourth Proportional to 66,309.67, 99,463.53 and 16,389.78

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Solution

The fourth proportional to 66,309.67, 99,463.53 and 16,389.78 is: 24,584.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,309.67 : 99,463.53 = 16,389.78 : x
  2. Step 2: Convert to fraction form
    66,309.67/99,463.53 = 16,389.78/x
  3. Step 3: Cross multiply
    66,309.67x = 99,463.53 × 16,389.78
  4. Step 4: Simplify right side
    66,309.67x = 1,630,185,374.72
  5. Step 5: Solve for x
    x = 1,630,185,374.72/66,309.67
  6. Step 6: Final answer
    x = 24,584.43

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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.