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Finding the Fourth Proportional to 112,910.50, 155,816.25 and 65,163.85

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Solution

The fourth proportional to 112,910.50, 155,816.25 and 65,163.85 is: 89,925.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,910.50 : 155,816.25 = 65,163.85 : x
  2. Step 2: Convert to fraction form
    112,910.50/155,816.25 = 65,163.85/x
  3. Step 3: Cross multiply
    112,910.50x = 155,816.25 × 65,163.85
  4. Step 4: Simplify right side
    112,910.50x = 10,153,586,353.02
  5. Step 5: Solve for x
    x = 10,153,586,353.02/112,910.50
  6. Step 6: Final answer
    x = 89,925.97

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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.