Home / 221,109.10-305,131.56-125,621.02

Finding the Fourth Proportional to 221,109.10, 305,131.56 and 125,621.02

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Solution

The fourth proportional to 221,109.10, 305,131.56 and 125,621.02 is: 173,357.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,109.10 : 305,131.56 = 125,621.02 : x
  2. Step 2: Convert to fraction form
    221,109.10/305,131.56 = 125,621.02/x
  3. Step 3: Cross multiply
    221,109.10x = 305,131.56 × 125,621.02
  4. Step 4: Simplify right side
    221,109.10x = 38,330,937,801.39
  5. Step 5: Solve for x
    x = 38,330,937,801.39/221,109.10
  6. Step 6: Final answer
    x = 173,357.58

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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.