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Finding the Fourth Proportional to 154,843.88, 213,640.63 and 90,315.94

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Solution

The fourth proportional to 154,843.88, 213,640.63 and 90,315.94 is: 124,610.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,843.88 : 213,640.63 = 90,315.94 : x
  2. Step 2: Convert to fraction form
    154,843.88/213,640.63 = 90,315.94/x
  3. Step 3: Cross multiply
    154,843.88x = 213,640.63 × 90,315.94
  4. Step 4: Simplify right side
    154,843.88x = 19,295,153,026.65
  5. Step 5: Solve for x
    x = 19,295,153,026.65/154,843.88
  6. Step 6: Final answer
    x = 124,610.37

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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.