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Finding the Fourth Proportional to 66,234.20, 99,368.90 and 28,778.20

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Solution

The fourth proportional to 66,234.20, 99,368.90 and 28,778.20 is: 43,174.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,234.20 : 99,368.90 = 28,778.20 : x
  2. Step 2: Convert to fraction form
    66,234.20/99,368.90 = 28,778.20/x
  3. Step 3: Cross multiply
    66,234.20x = 99,368.90 × 28,778.20
  4. Step 4: Simplify right side
    66,234.20x = 2,859,658,077.98
  5. Step 5: Solve for x
    x = 2,859,658,077.98/66,234.20
  6. Step 6: Final answer
    x = 43,174.95

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1.5x scale

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.