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Finding the Fourth Proportional to 45,718.71, 68,578.05 and 19,404.99

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Solution

The fourth proportional to 45,718.71, 68,578.05 and 19,404.99 is: 29,107.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,718.71 : 68,578.05 = 19,404.99 : x
  2. Step 2: Convert to fraction form
    45,718.71/68,578.05 = 19,404.99/x
  3. Step 3: Cross multiply
    45,718.71x = 68,578.05 × 19,404.99
  4. Step 4: Simplify right side
    45,718.71x = 1,330,756,374.47
  5. Step 5: Solve for x
    x = 1,330,756,374.47/45,718.71
  6. Step 6: Final answer
    x = 29,107.48

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Similar ratio
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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.