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Finding the Fourth Proportional to 66,373.34, 99,544.30 and 18,986.98

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Solution

The fourth proportional to 66,373.34, 99,544.30 and 18,986.98 is: 28,475.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,373.34 : 99,544.30 = 18,986.98 : x
  2. Step 2: Convert to fraction form
    66,373.34/99,544.30 = 18,986.98/x
  3. Step 3: Cross multiply
    66,373.34x = 99,544.30 × 18,986.98
  4. Step 4: Simplify right side
    66,373.34x = 1,890,045,633.21
  5. Step 5: Solve for x
    x = 1,890,045,633.21/66,373.34
  6. Step 6: Final answer
    x = 28,475.98

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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.