Home / 100,215.45-138,291.98-54,891.09

Finding the Fourth Proportional to 100,215.45, 138,291.98 and 54,891.09

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Solution

The fourth proportional to 100,215.45, 138,291.98 and 54,891.09 is: 75,746.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,215.45 : 138,291.98 = 54,891.09 : x
  2. Step 2: Convert to fraction form
    100,215.45/138,291.98 = 54,891.09/x
  3. Step 3: Cross multiply
    100,215.45x = 138,291.98 × 54,891.09
  4. Step 4: Simplify right side
    100,215.45x = 7,590,997,246.00
  5. Step 5: Solve for x
    x = 7,590,997,246.00/100,215.45
  6. Step 6: Final answer
    x = 75,746.78

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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.