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Finding the Fourth Proportional to 66,505.50, 99,758.13 and 38,784.06

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Solution

The fourth proportional to 66,505.50, 99,758.13 and 38,784.06 is: 58,176.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,505.50 : 99,758.13 = 38,784.06 : x
  2. Step 2: Convert to fraction form
    66,505.50/99,758.13 = 38,784.06/x
  3. Step 3: Cross multiply
    66,505.50x = 99,758.13 × 38,784.06
  4. Step 4: Simplify right side
    66,505.50x = 3,869,025,299.41
  5. Step 5: Solve for x
    x = 3,869,025,299.41/66,505.50
  6. Step 6: Final answer
    x = 58,176.02

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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.