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Finding the Fourth Proportional to 157,611.89, 217,505.13 and 85,993.40

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Solution

The fourth proportional to 157,611.89, 217,505.13 and 85,993.40 is: 118,671.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,611.89 : 217,505.13 = 85,993.40 : x
  2. Step 2: Convert to fraction form
    157,611.89/217,505.13 = 85,993.40/x
  3. Step 3: Cross multiply
    157,611.89x = 217,505.13 × 85,993.40
  4. Step 4: Simplify right side
    157,611.89x = 18,704,005,646.14
  5. Step 5: Solve for x
    x = 18,704,005,646.14/157,611.89
  6. Step 6: Final answer
    x = 118,671.29

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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.