Home / 90,803.21-136,205.42-31,640.00

Finding the Fourth Proportional to 90,803.21, 136,205.42 and 31,640.00

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Solution

The fourth proportional to 90,803.21, 136,205.42 and 31,640.00 is: 47,460.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,803.21 : 136,205.42 = 31,640.00 : x
  2. Step 2: Convert to fraction form
    90,803.21/136,205.42 = 31,640.00/x
  3. Step 3: Cross multiply
    90,803.21x = 136,205.42 × 31,640.00
  4. Step 4: Simplify right side
    90,803.21x = 4,309,538,649.57
  5. Step 5: Solve for x
    x = 4,309,538,649.57/90,803.21
  6. Step 6: Final answer
    x = 47,460.20

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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.