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Finding the Fourth Proportional to 203,368.60, 305,139.30 and 98,133.40

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Solution

The fourth proportional to 203,368.60, 305,139.30 and 98,133.40 is: 147,241.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,368.60 : 305,139.30 = 98,133.40 : x
  2. Step 2: Convert to fraction form
    203,368.60/305,139.30 = 98,133.40/x
  3. Step 3: Cross multiply
    203,368.60x = 305,139.30 × 98,133.40
  4. Step 4: Simplify right side
    203,368.60x = 29,944,356,982.62
  5. Step 5: Solve for x
    x = 29,944,356,982.62/203,368.60
  6. Step 6: Final answer
    x = 147,241.79

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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.