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Finding the Fourth Proportional to 66,618.21, 99,969 and 41,706.90

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Solution

The fourth proportional to 66,618.21, 99,969 and 41,706.90 is: 62,586.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,618.21 : 99,969 = 41,706.90 : x
  2. Step 2: Convert to fraction form
    66,618.21/99,969 = 41,706.90/x
  3. Step 3: Cross multiply
    66,618.21x = 99,969 × 41,706.90
  4. Step 4: Simplify right side
    66,618.21x = 4,169,397,086.10
  5. Step 5: Solve for x
    x = 4,169,397,086.10/66,618.21
  6. Step 6: Final answer
    x = 62,586.45

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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.