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Finding the Fourth Proportional to 150,718.71, 207,993.20 and 87,055.05

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Solution

The fourth proportional to 150,718.71, 207,993.20 and 87,055.05 is: 120,136.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,718.71 : 207,993.20 = 87,055.05 : x
  2. Step 2: Convert to fraction form
    150,718.71/207,993.20 = 87,055.05/x
  3. Step 3: Cross multiply
    150,718.71x = 207,993.20 × 87,055.05
  4. Step 4: Simplify right side
    150,718.71x = 18,106,857,990.38
  5. Step 5: Solve for x
    x = 18,106,857,990.38/150,718.71
  6. Step 6: Final answer
    x = 120,136.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.