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Finding the Fourth Proportional to 66,485.70, 99,728.55 and 63,861.30

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Solution

The fourth proportional to 66,485.70, 99,728.55 and 63,861.30 is: 95,791.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,485.70 : 99,728.55 = 63,861.30 : x
  2. Step 2: Convert to fraction form
    66,485.70/99,728.55 = 63,861.30/x
  3. Step 3: Cross multiply
    66,485.70x = 99,728.55 × 63,861.30
  4. Step 4: Simplify right side
    66,485.70x = 6,368,794,850.12
  5. Step 5: Solve for x
    x = 6,368,794,850.12/66,485.70
  6. Step 6: Final answer
    x = 95,791.95

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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.