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Finding the Fourth Proportional to 156,136.97, 215,469.54 and 84,516.96

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Solution

The fourth proportional to 156,136.97, 215,469.54 and 84,516.96 is: 116,633.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,136.97 : 215,469.54 = 84,516.96 : x
  2. Step 2: Convert to fraction form
    156,136.97/215,469.54 = 84,516.96/x
  3. Step 3: Cross multiply
    156,136.97x = 215,469.54 × 84,516.96
  4. Step 4: Simplify right side
    156,136.97x = 18,210,830,493.40
  5. Step 5: Solve for x
    x = 18,210,830,493.40/156,136.97
  6. Step 6: Final answer
    x = 116,633.69

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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.