Home / 90,828.90-136,352.70-90,172.80

Finding the Fourth Proportional to 90,828.90, 136,352.70 and 90,172.80

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Solution

The fourth proportional to 90,828.90, 136,352.70 and 90,172.80 is: 135,367.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,828.90 : 136,352.70 = 90,172.80 : x
  2. Step 2: Convert to fraction form
    90,828.90/136,352.70 = 90,172.80/x
  3. Step 3: Cross multiply
    90,828.90x = 136,352.70 × 90,172.80
  4. Step 4: Simplify right side
    90,828.90x = 12,295,304,746.56
  5. Step 5: Solve for x
    x = 12,295,304,746.56/90,828.90
  6. Step 6: Final answer
    x = 135,367.76

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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.