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Finding the Fourth Proportional to 156,721.50, 216,269.60 and 85,099.92

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Solution

The fourth proportional to 156,721.50, 216,269.60 and 85,099.92 is: 117,434.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,721.50 : 216,269.60 = 85,099.92 : x
  2. Step 2: Convert to fraction form
    156,721.50/216,269.60 = 85,099.92/x
  3. Step 3: Cross multiply
    156,721.50x = 216,269.60 × 85,099.92
  4. Step 4: Simplify right side
    156,721.50x = 18,404,525,658.43
  5. Step 5: Solve for x
    x = 18,404,525,658.43/156,721.50
  6. Step 6: Final answer
    x = 117,434.59

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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.