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Finding the Fourth Proportional to 156,329.72, 215,735.76 and 84,709.87

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Solution

The fourth proportional to 156,329.72, 215,735.76 and 84,709.87 is: 116,900.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,329.72 : 215,735.76 = 84,709.87 : x
  2. Step 2: Convert to fraction form
    156,329.72/215,735.76 = 84,709.87/x
  3. Step 3: Cross multiply
    156,329.72x = 215,735.76 × 84,709.87
  4. Step 4: Simplify right side
    156,329.72x = 18,274,947,644.61
  5. Step 5: Solve for x
    x = 18,274,947,644.61/156,329.72
  6. Step 6: Final answer
    x = 116,900.02

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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.