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Finding the Fourth Proportional to 72,342.12, 107,803.17 and 69,963.96

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Solution

The fourth proportional to 72,342.12, 107,803.17 and 69,963.96 is: 104,259.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,342.12 : 107,803.17 = 69,963.96 : x
  2. Step 2: Convert to fraction form
    72,342.12/107,803.17 = 69,963.96/x
  3. Step 3: Cross multiply
    72,342.12x = 107,803.17 × 69,963.96
  4. Step 4: Simplify right side
    72,342.12x = 7,542,336,673.75
  5. Step 5: Solve for x
    x = 7,542,336,673.75/72,342.12
  6. Step 6: Final answer
    x = 104,259.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.