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Finding the Fourth Proportional to 209,139.20, 313,363.20 and 178,035.20

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Solution

The fourth proportional to 209,139.20, 313,363.20 and 178,035.20 is: 266,758.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,139.20 : 313,363.20 = 178,035.20 : x
  2. Step 2: Convert to fraction form
    209,139.20/313,363.20 = 178,035.20/x
  3. Step 3: Cross multiply
    209,139.20x = 313,363.20 × 178,035.20
  4. Step 4: Simplify right side
    209,139.20x = 55,789,679,984.64
  5. Step 5: Solve for x
    x = 55,789,679,984.64/209,139.20
  6. Step 6: Final answer
    x = 266,758.60

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1.5x scale

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.