Home / 76,731.32-115,096.98-72,399.80

Finding the Fourth Proportional to 76,731.32, 115,096.98 and 72,399.80

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Solution

The fourth proportional to 76,731.32, 115,096.98 and 72,399.80 is: 108,599.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,731.32 : 115,096.98 = 72,399.80 : x
  2. Step 2: Convert to fraction form
    76,731.32/115,096.98 = 72,399.80/x
  3. Step 3: Cross multiply
    76,731.32x = 115,096.98 × 72,399.80
  4. Step 4: Simplify right side
    76,731.32x = 8,332,998,332.60
  5. Step 5: Solve for x
    x = 8,332,998,332.60/76,731.32
  6. Step 6: Final answer
    x = 108,599.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.