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Finding the Fourth Proportional to 203,465.40, 305,198.10 and 55,721.40

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Solution

The fourth proportional to 203,465.40, 305,198.10 and 55,721.40 is: 83,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,465.40 : 305,198.10 = 55,721.40 : x
  2. Step 2: Convert to fraction form
    203,465.40/305,198.10 = 55,721.40/x
  3. Step 3: Cross multiply
    203,465.40x = 305,198.10 × 55,721.40
  4. Step 4: Simplify right side
    203,465.40x = 17,006,065,409.34
  5. Step 5: Solve for x
    x = 17,006,065,409.34/203,465.40
  6. Step 6: Final answer
    x = 83,582.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.