Home / 90,912.78-136,370.16-31,748.58

Finding the Fourth Proportional to 90,912.78, 136,370.16 and 31,748.58

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Solution

The fourth proportional to 90,912.78, 136,370.16 and 31,748.58 is: 47,623.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,912.78 : 136,370.16 = 31,748.58 : x
  2. Step 2: Convert to fraction form
    90,912.78/136,370.16 = 31,748.58/x
  3. Step 3: Cross multiply
    90,912.78x = 136,370.16 × 31,748.58
  4. Step 4: Simplify right side
    90,912.78x = 4,329,558,934.37
  5. Step 5: Solve for x
    x = 4,329,558,934.37/90,912.78
  6. Step 6: Final answer
    x = 47,623.22

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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.