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Finding the Fourth Proportional to 76,495.89, 105,520.37 and 47,765.68

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Solution

The fourth proportional to 76,495.89, 105,520.37 and 47,765.68 is: 65,889.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,495.89 : 105,520.37 = 47,765.68 : x
  2. Step 2: Convert to fraction form
    76,495.89/105,520.37 = 47,765.68/x
  3. Step 3: Cross multiply
    76,495.89x = 105,520.37 × 47,765.68
  4. Step 4: Simplify right side
    76,495.89x = 5,040,251,724.27
  5. Step 5: Solve for x
    x = 5,040,251,724.27/76,495.89
  6. Step 6: Final answer
    x = 65,889.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.