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Finding the Fourth Proportional to 203,430.80, 305,146.20 and 98,260.40

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Solution

The fourth proportional to 203,430.80, 305,146.20 and 98,260.40 is: 147,390.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,430.80 : 305,146.20 = 98,260.40 : x
  2. Step 2: Convert to fraction form
    203,430.80/305,146.20 = 98,260.40/x
  3. Step 3: Cross multiply
    203,430.80x = 305,146.20 × 98,260.40
  4. Step 4: Simplify right side
    203,430.80x = 29,983,787,670.48
  5. Step 5: Solve for x
    x = 29,983,787,670.48/203,430.80
  6. Step 6: Final answer
    x = 147,390.60

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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.