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Finding the Fourth Proportional to 156,632.67, 216,153.26 and 85,012.74

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Solution

The fourth proportional to 156,632.67, 216,153.26 and 85,012.74 is: 117,317.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,632.67 : 216,153.26 = 85,012.74 : x
  2. Step 2: Convert to fraction form
    156,632.67/216,153.26 = 85,012.74/x
  3. Step 3: Cross multiply
    156,632.67x = 216,153.26 × 85,012.74
  4. Step 4: Simplify right side
    156,632.67x = 18,375,780,786.27
  5. Step 5: Solve for x
    x = 18,375,780,786.27/156,632.67
  6. Step 6: Final answer
    x = 117,317.68

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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.