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Finding the Fourth Proportional to 208,701.65, 313,064.91 and 80,618.92

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Solution

The fourth proportional to 208,701.65, 313,064.91 and 80,618.92 is: 120,933.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,701.65 : 313,064.91 = 80,618.92 : x
  2. Step 2: Convert to fraction form
    208,701.65/313,064.91 = 80,618.92/x
  3. Step 3: Cross multiply
    208,701.65x = 313,064.91 × 80,618.92
  4. Step 4: Simplify right side
    208,701.65x = 25,238,954,151.43
  5. Step 5: Solve for x
    x = 25,238,954,151.43/208,701.65
  6. Step 6: Final answer
    x = 120,933.18

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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.