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Finding the Fourth Proportional to 235,720.80, 353,581.20 and 212,101.20

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Solution

The fourth proportional to 235,720.80, 353,581.20 and 212,101.20 is: 318,151.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,720.80 : 353,581.20 = 212,101.20 : x
  2. Step 2: Convert to fraction form
    235,720.80/353,581.20 = 212,101.20/x
  3. Step 3: Cross multiply
    235,720.80x = 353,581.20 × 212,101.20
  4. Step 4: Simplify right side
    235,720.80x = 74,994,996,817.44
  5. Step 5: Solve for x
    x = 74,994,996,817.44/235,720.80
  6. Step 6: Final answer
    x = 318,151.80

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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.