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Finding the Fourth Proportional to 76,699.70, 105,845.37 and 43,165.70

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Solution

The fourth proportional to 76,699.70, 105,845.37 and 43,165.70 is: 59,568.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,699.70 : 105,845.37 = 43,165.70 : x
  2. Step 2: Convert to fraction form
    76,699.70/105,845.37 = 43,165.70/x
  3. Step 3: Cross multiply
    76,699.70x = 105,845.37 × 43,165.70
  4. Step 4: Simplify right side
    76,699.70x = 4,568,889,487.81
  5. Step 5: Solve for x
    x = 4,568,889,487.81/76,699.70
  6. Step 6: Final answer
    x = 59,568.54

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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.