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Finding the Fourth Proportional to 73,521.60, 109,990.80 and 63,769.20

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Solution

The fourth proportional to 73,521.60, 109,990.80 and 63,769.20 is: 95,400.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,521.60 : 109,990.80 = 63,769.20 : x
  2. Step 2: Convert to fraction form
    73,521.60/109,990.80 = 63,769.20/x
  3. Step 3: Cross multiply
    73,521.60x = 109,990.80 × 63,769.20
  4. Step 4: Simplify right side
    73,521.60x = 7,014,025,323.36
  5. Step 5: Solve for x
    x = 7,014,025,323.36/73,521.60
  6. Step 6: Final answer
    x = 95,400.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.