Home / 90,450.78-135,708.57-31,292.34

Finding the Fourth Proportional to 90,450.78, 135,708.57 and 31,292.34

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Solution

The fourth proportional to 90,450.78, 135,708.57 and 31,292.34 is: 46,949.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,450.78 : 135,708.57 = 31,292.34 : x
  2. Step 2: Convert to fraction form
    90,450.78/135,708.57 = 31,292.34/x
  3. Step 3: Cross multiply
    90,450.78x = 135,708.57 × 31,292.34
  4. Step 4: Simplify right side
    90,450.78x = 4,246,638,713.35
  5. Step 5: Solve for x
    x = 4,246,638,713.35/90,450.78
  6. Step 6: Final answer
    x = 46,949.72

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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.