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Finding the Fourth Proportional to 235,412.40, 353,118.60 and 85,821.60

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Solution

The fourth proportional to 235,412.40, 353,118.60 and 85,821.60 is: 128,732.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,412.40 : 353,118.60 = 85,821.60 : x
  2. Step 2: Convert to fraction form
    235,412.40/353,118.60 = 85,821.60/x
  3. Step 3: Cross multiply
    235,412.40x = 353,118.60 × 85,821.60
  4. Step 4: Simplify right side
    235,412.40x = 30,305,203,241.76
  5. Step 5: Solve for x
    x = 30,305,203,241.76/235,412.40
  6. Step 6: Final answer
    x = 128,732.40

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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.