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Finding the Fourth Proportional to 221,420.16, 305,566.56 and 125,940.60

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Solution

The fourth proportional to 221,420.16, 305,566.56 and 125,940.60 is: 173,801.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,420.16 : 305,566.56 = 125,940.60 : x
  2. Step 2: Convert to fraction form
    221,420.16/305,566.56 = 125,940.60/x
  3. Step 3: Cross multiply
    221,420.16x = 305,566.56 × 125,940.60
  4. Step 4: Simplify right side
    221,420.16x = 38,483,235,906.34
  5. Step 5: Solve for x
    x = 38,483,235,906.34/221,420.16
  6. Step 6: Final answer
    x = 173,801.86

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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.