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Finding the Fourth Proportional to 209,219.20, 313,814.40 and 67,062.40

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Solution

The fourth proportional to 209,219.20, 313,814.40 and 67,062.40 is: 100,588.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,219.20 : 313,814.40 = 67,062.40 : x
  2. Step 2: Convert to fraction form
    209,219.20/313,814.40 = 67,062.40/x
  3. Step 3: Cross multiply
    209,219.20x = 313,814.40 × 67,062.40
  4. Step 4: Simplify right side
    209,219.20x = 21,045,146,818.56
  5. Step 5: Solve for x
    x = 21,045,146,818.56/209,219.20
  6. Step 6: Final answer
    x = 100,588.98

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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.