Home / 76,511.60-114,443.40-68,670.80

Finding the Fourth Proportional to 76,511.60, 114,443.40 and 68,670.80

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Solution

The fourth proportional to 76,511.60, 114,443.40 and 68,670.80 is: 102,715.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,511.60 : 114,443.40 = 68,670.80 : x
  2. Step 2: Convert to fraction form
    76,511.60/114,443.40 = 68,670.80/x
  3. Step 3: Cross multiply
    76,511.60x = 114,443.40 × 68,670.80
  4. Step 4: Simplify right side
    76,511.60x = 7,858,919,832.72
  5. Step 5: Solve for x
    x = 7,858,919,832.72/76,511.60
  6. Step 6: Final answer
    x = 102,715.40

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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.