Home / 221,981.16-306,390.96-137,049.48

Finding the Fourth Proportional to 221,981.16, 306,390.96 and 137,049.48

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Solution

The fourth proportional to 221,981.16, 306,390.96 and 137,049.48 is: 189,163.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,981.16 : 306,390.96 = 137,049.48 : x
  2. Step 2: Convert to fraction form
    221,981.16/306,390.96 = 137,049.48/x
  3. Step 3: Cross multiply
    221,981.16x = 306,390.96 × 137,049.48
  4. Step 4: Simplify right side
    221,981.16x = 41,990,721,744.70
  5. Step 5: Solve for x
    x = 41,990,721,744.70/221,981.16
  6. Step 6: Final answer
    x = 189,163.45

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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.