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Finding the Fourth Proportional to 73,781.80, 110,672.70 and 51,620.20

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Solution

The fourth proportional to 73,781.80, 110,672.70 and 51,620.20 is: 77,430.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,781.80 : 110,672.70 = 51,620.20 : x
  2. Step 2: Convert to fraction form
    73,781.80/110,672.70 = 51,620.20/x
  3. Step 3: Cross multiply
    73,781.80x = 110,672.70 × 51,620.20
  4. Step 4: Simplify right side
    73,781.80x = 5,712,946,908.54
  5. Step 5: Solve for x
    x = 5,712,946,908.54/73,781.80
  6. Step 6: Final answer
    x = 77,430.30

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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.