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Finding the Fourth Proportional to 156,491.88, 215,957.58 and 84,872.04

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Solution

The fourth proportional to 156,491.88, 215,957.58 and 84,872.04 is: 117,122.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,491.88 : 215,957.58 = 84,872.04 : x
  2. Step 2: Convert to fraction form
    156,491.88/215,957.58 = 84,872.04/x
  3. Step 3: Cross multiply
    156,491.88x = 215,957.58 × 84,872.04
  4. Step 4: Simplify right side
    156,491.88x = 18,328,760,368.06
  5. Step 5: Solve for x
    x = 18,328,760,368.06/156,491.88
  6. Step 6: Final answer
    x = 117,122.76

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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.