Home / 102,821.40-154,001.70-53,515.80

Finding the Fourth Proportional to 102,821.40, 154,001.70 and 53,515.80

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Solution

The fourth proportional to 102,821.40, 154,001.70 and 53,515.80 is: 80,153.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,821.40 : 154,001.70 = 53,515.80 : x
  2. Step 2: Convert to fraction form
    102,821.40/154,001.70 = 53,515.80/x
  3. Step 3: Cross multiply
    102,821.40x = 154,001.70 × 53,515.80
  4. Step 4: Simplify right side
    102,821.40x = 8,241,524,176.86
  5. Step 5: Solve for x
    x = 8,241,524,176.86/102,821.40
  6. Step 6: Final answer
    x = 80,153.78

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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.