Home / 78,635.37-117,382.93-72,781.73

Finding the Fourth Proportional to 78,635.37, 117,382.93 and 72,781.73

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Solution

The fourth proportional to 78,635.37, 117,382.93 and 72,781.73 is: 108,644.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,635.37 : 117,382.93 = 72,781.73 : x
  2. Step 2: Convert to fraction form
    78,635.37/117,382.93 = 72,781.73/x
  3. Step 3: Cross multiply
    78,635.37x = 117,382.93 × 72,781.73
  4. Step 4: Simplify right side
    78,635.37x = 8,543,331,949.00
  5. Step 5: Solve for x
    x = 8,543,331,949.00/78,635.37
  6. Step 6: Final answer
    x = 108,644.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.