Home / 90,905.26-136,320.62-31,720.98

Finding the Fourth Proportional to 90,905.26, 136,320.62 and 31,720.98

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Solution

The fourth proportional to 90,905.26, 136,320.62 and 31,720.98 is: 47,568.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,905.26 : 136,320.62 = 31,720.98 : x
  2. Step 2: Convert to fraction form
    90,905.26/136,320.62 = 31,720.98/x
  3. Step 3: Cross multiply
    90,905.26x = 136,320.62 × 31,720.98
  4. Step 4: Simplify right side
    90,905.26x = 4,324,223,660.61
  5. Step 5: Solve for x
    x = 4,324,223,660.61/90,905.26
  6. Step 6: Final answer
    x = 47,568.46

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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.