Home / 102,812.20-154,103.10-43,637.80

Finding the Fourth Proportional to 102,812.20, 154,103.10 and 43,637.80

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Solution

The fourth proportional to 102,812.20, 154,103.10 and 43,637.80 is: 65,407.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,812.20 : 154,103.10 = 43,637.80 : x
  2. Step 2: Convert to fraction form
    102,812.20/154,103.10 = 43,637.80/x
  3. Step 3: Cross multiply
    102,812.20x = 154,103.10 × 43,637.80
  4. Step 4: Simplify right side
    102,812.20x = 6,724,720,257.18
  5. Step 5: Solve for x
    x = 6,724,720,257.18/102,812.20
  6. Step 6: Final answer
    x = 65,407.80

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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.