Home / 90,983.43-136,388.79-31,780.53

Finding the Fourth Proportional to 90,983.43, 136,388.79 and 31,780.53

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Solution

The fourth proportional to 90,983.43, 136,388.79 and 31,780.53 is: 47,640.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,983.43 : 136,388.79 = 31,780.53 : x
  2. Step 2: Convert to fraction form
    90,983.43/136,388.79 = 31,780.53/x
  3. Step 3: Cross multiply
    90,983.43x = 136,388.79 × 31,780.53
  4. Step 4: Simplify right side
    90,983.43x = 4,334,508,032.26
  5. Step 5: Solve for x
    x = 4,334,508,032.26/90,983.43
  6. Step 6: Final answer
    x = 47,640.63

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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.