Home / 103,402.09-155,180.33-76,809.48

Finding the Fourth Proportional to 103,402.09, 155,180.33 and 76,809.48

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Solution

The fourth proportional to 103,402.09, 155,180.33 and 76,809.48 is: 115,271.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,402.09 : 155,180.33 = 76,809.48 : x
  2. Step 2: Convert to fraction form
    103,402.09/155,180.33 = 76,809.48/x
  3. Step 3: Cross multiply
    103,402.09x = 155,180.33 × 76,809.48
  4. Step 4: Simplify right side
    103,402.09x = 11,919,320,453.53
  5. Step 5: Solve for x
    x = 11,919,320,453.53/103,402.09
  6. Step 6: Final answer
    x = 115,271.56

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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.