Home / 103,623.20-155,434.80-81,072.80

Finding the Fourth Proportional to 103,623.20, 155,434.80 and 81,072.80

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Solution

The fourth proportional to 103,623.20, 155,434.80 and 81,072.80 is: 121,609.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,623.20 : 155,434.80 = 81,072.80 : x
  2. Step 2: Convert to fraction form
    103,623.20/155,434.80 = 81,072.80/x
  3. Step 3: Cross multiply
    103,623.20x = 155,434.80 × 81,072.80
  4. Step 4: Simplify right side
    103,623.20x = 12,601,534,453.44
  5. Step 5: Solve for x
    x = 12,601,534,453.44/103,623.20
  6. Step 6: Final answer
    x = 121,609.20

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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.