Home / 205,121.87-307,718.91-70,154.21

Finding the Fourth Proportional to 205,121.87, 307,718.91 and 70,154.21

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Solution

The fourth proportional to 205,121.87, 307,718.91 and 70,154.21 is: 105,243.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,121.87 : 307,718.91 = 70,154.21 : x
  2. Step 2: Convert to fraction form
    205,121.87/307,718.91 = 70,154.21/x
  3. Step 3: Cross multiply
    205,121.87x = 307,718.91 × 70,154.21
  4. Step 4: Simplify right side
    205,121.87x = 21,587,775,494.52
  5. Step 5: Solve for x
    x = 21,587,775,494.52/205,121.87
  6. Step 6: Final answer
    x = 105,243.66

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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.