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Finding the Fourth Proportional to 72,309.76, 107,972.34 and 63,805.36

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Solution

The fourth proportional to 72,309.76, 107,972.34 and 63,805.36 is: 95,273.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,309.76 : 107,972.34 = 63,805.36 : x
  2. Step 2: Convert to fraction form
    72,309.76/107,972.34 = 63,805.36/x
  3. Step 3: Cross multiply
    72,309.76x = 107,972.34 × 63,805.36
  4. Step 4: Simplify right side
    72,309.76x = 6,889,214,023.74
  5. Step 5: Solve for x
    x = 6,889,214,023.74/72,309.76
  6. Step 6: Final answer
    x = 95,273.64

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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.