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Finding the Fourth Proportional to 76,182.78, 114,287.44 and 31,840.68

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Solution

The fourth proportional to 76,182.78, 114,287.44 and 31,840.68 is: 47,766.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,182.78 : 114,287.44 = 31,840.68 : x
  2. Step 2: Convert to fraction form
    76,182.78/114,287.44 = 31,840.68/x
  3. Step 3: Cross multiply
    76,182.78x = 114,287.44 × 31,840.68
  4. Step 4: Simplify right side
    76,182.78x = 3,638,989,805.06
  5. Step 5: Solve for x
    x = 3,638,989,805.06/76,182.78
  6. Step 6: Final answer
    x = 47,766.57

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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.