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Finding the Fourth Proportional to 156,937.67, 216,564.78 and 85,317.06

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Solution

The fourth proportional to 156,937.67, 216,564.78 and 85,317.06 is: 117,732.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,937.67 : 216,564.78 = 85,317.06 : x
  2. Step 2: Convert to fraction form
    156,937.67/216,564.78 = 85,317.06/x
  3. Step 3: Cross multiply
    156,937.67x = 216,564.78 × 85,317.06
  4. Step 4: Simplify right side
    156,937.67x = 18,476,670,329.15
  5. Step 5: Solve for x
    x = 18,476,670,329.15/156,937.67
  6. Step 6: Final answer
    x = 117,732.54

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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.