Home / 103,931.82-155,781.09-51,378.21

Finding the Fourth Proportional to 103,931.82, 155,781.09 and 51,378.21

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Solution

The fourth proportional to 103,931.82, 155,781.09 and 51,378.21 is: 77,009.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,931.82 : 155,781.09 = 51,378.21 : x
  2. Step 2: Convert to fraction form
    103,931.82/155,781.09 = 51,378.21/x
  3. Step 3: Cross multiply
    103,931.82x = 155,781.09 × 51,378.21
  4. Step 4: Simplify right side
    103,931.82x = 8,003,753,556.05
  5. Step 5: Solve for x
    x = 8,003,753,556.05/103,931.82
  6. Step 6: Final answer
    x = 77,009.65

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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.