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Finding the Fourth Proportional to 221,361.95, 305,478.07 and 125,868.64

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Solution

The fourth proportional to 221,361.95, 305,478.07 and 125,868.64 is: 173,697.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,361.95 : 305,478.07 = 125,868.64 : x
  2. Step 2: Convert to fraction form
    221,361.95/305,478.07 = 125,868.64/x
  3. Step 3: Cross multiply
    221,361.95x = 305,478.07 × 125,868.64
  4. Step 4: Simplify right side
    221,361.95x = 38,450,108,142.36
  5. Step 5: Solve for x
    x = 38,450,108,142.36/221,361.95
  6. Step 6: Final answer
    x = 173,697.91

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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.