Home / 90,834.80-136,252.20-68,716.40

Finding the Fourth Proportional to 90,834.80, 136,252.20 and 68,716.40

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Solution

The fourth proportional to 90,834.80, 136,252.20 and 68,716.40 is: 103,074.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,834.80 : 136,252.20 = 68,716.40 : x
  2. Step 2: Convert to fraction form
    90,834.80/136,252.20 = 68,716.40/x
  3. Step 3: Cross multiply
    90,834.80x = 136,252.20 × 68,716.40
  4. Step 4: Simplify right side
    90,834.80x = 9,362,760,676.08
  5. Step 5: Solve for x
    x = 9,362,760,676.08/90,834.80
  6. Step 6: Final answer
    x = 103,074.60

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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.