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Finding the Fourth Proportional to 66,611.16, 91,926.90 and 38,321.10

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Solution

The fourth proportional to 66,611.16, 91,926.90 and 38,321.10 is: 52,885.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,611.16 : 91,926.90 = 38,321.10 : x
  2. Step 2: Convert to fraction form
    66,611.16/91,926.90 = 38,321.10/x
  3. Step 3: Cross multiply
    66,611.16x = 91,926.90 × 38,321.10
  4. Step 4: Simplify right side
    66,611.16x = 3,522,739,927.59
  5. Step 5: Solve for x
    x = 3,522,739,927.59/66,611.16
  6. Step 6: Final answer
    x = 52,885.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.