Home / 90,829.50-136,245-31,665.06

Finding the Fourth Proportional to 90,829.50, 136,245 and 31,665.06

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Solution

The fourth proportional to 90,829.50, 136,245 and 31,665.06 is: 47,497.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,829.50 : 136,245 = 31,665.06 : x
  2. Step 2: Convert to fraction form
    90,829.50/136,245 = 31,665.06/x
  3. Step 3: Cross multiply
    90,829.50x = 136,245 × 31,665.06
  4. Step 4: Simplify right side
    90,829.50x = 4,314,206,099.70
  5. Step 5: Solve for x
    x = 4,314,206,099.70/90,829.50
  6. Step 6: Final answer
    x = 47,497.85

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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.