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Finding the Fourth Proportional to 221,109.32, 305,131.92 and 125,621.26

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Solution

The fourth proportional to 221,109.32, 305,131.92 and 125,621.26 is: 173,357.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,109.32 : 305,131.92 = 125,621.26 : x
  2. Step 2: Convert to fraction form
    221,109.32/305,131.92 = 125,621.26/x
  3. Step 3: Cross multiply
    221,109.32x = 305,131.92 × 125,621.26
  4. Step 4: Simplify right side
    221,109.32x = 38,331,055,022.71
  5. Step 5: Solve for x
    x = 38,331,055,022.71/221,109.32
  6. Step 6: Final answer
    x = 173,357.93

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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.