Home / 90,810.20-136,215.30-81,624.80

Finding the Fourth Proportional to 90,810.20, 136,215.30 and 81,624.80

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Solution

The fourth proportional to 90,810.20, 136,215.30 and 81,624.80 is: 122,437.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,810.20 : 136,215.30 = 81,624.80 : x
  2. Step 2: Convert to fraction form
    90,810.20/136,215.30 = 81,624.80/x
  3. Step 3: Cross multiply
    90,810.20x = 136,215.30 × 81,624.80
  4. Step 4: Simplify right side
    90,810.20x = 11,118,546,619.44
  5. Step 5: Solve for x
    x = 11,118,546,619.44/90,810.20
  6. Step 6: Final answer
    x = 122,437.20

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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.