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Finding the Fourth Proportional to 76,390.41, 114,588.72 and 36,388.83

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Solution

The fourth proportional to 76,390.41, 114,588.72 and 36,388.83 is: 54,584.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,390.41 : 114,588.72 = 36,388.83 : x
  2. Step 2: Convert to fraction form
    76,390.41/114,588.72 = 36,388.83/x
  3. Step 3: Cross multiply
    76,390.41x = 114,588.72 × 36,388.83
  4. Step 4: Simplify right side
    76,390.41x = 4,169,749,452.00
  5. Step 5: Solve for x
    x = 4,169,749,452.00/76,390.41
  6. Step 6: Final answer
    x = 54,584.72

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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.