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Finding the Fourth Proportional to 75,321.48, 103,939.16 and 43,059.60

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Solution

The fourth proportional to 75,321.48, 103,939.16 and 43,059.60 is: 59,419.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,321.48 : 103,939.16 = 43,059.60 : x
  2. Step 2: Convert to fraction form
    75,321.48/103,939.16 = 43,059.60/x
  3. Step 3: Cross multiply
    75,321.48x = 103,939.16 × 43,059.60
  4. Step 4: Simplify right side
    75,321.48x = 4,475,578,653.94
  5. Step 5: Solve for x
    x = 4,475,578,653.94/75,321.48
  6. Step 6: Final answer
    x = 59,419.69

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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.