Home / 154,290.43-212,940.49-86,311.18

Finding the Fourth Proportional to 154,290.43, 212,940.49 and 86,311.18

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Solution

The fourth proportional to 154,290.43, 212,940.49 and 86,311.18 is: 119,120.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,290.43 : 212,940.49 = 86,311.18 : x
  2. Step 2: Convert to fraction form
    154,290.43/212,940.49 = 86,311.18/x
  3. Step 3: Cross multiply
    154,290.43x = 212,940.49 × 86,311.18
  4. Step 4: Simplify right side
    154,290.43x = 18,379,144,530.12
  5. Step 5: Solve for x
    x = 18,379,144,530.12/154,290.43
  6. Step 6: Final answer
    x = 119,120.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.