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Finding the Fourth Proportional to 73,680.80, 110,521.20 and 18,276.80

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Solution

The fourth proportional to 73,680.80, 110,521.20 and 18,276.80 is: 27,415.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,680.80 : 110,521.20 = 18,276.80 : x
  2. Step 2: Convert to fraction form
    73,680.80/110,521.20 = 18,276.80/x
  3. Step 3: Cross multiply
    73,680.80x = 110,521.20 × 18,276.80
  4. Step 4: Simplify right side
    73,680.80x = 2,019,973,868.16
  5. Step 5: Solve for x
    x = 2,019,973,868.16/73,680.80
  6. Step 6: Final answer
    x = 27,415.20

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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.