Home / 390,163.20-585,244.81-109,680.45

Finding the Fourth Proportional to 390,163.20, 585,244.81 and 109,680.45

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Solution

The fourth proportional to 390,163.20, 585,244.81 and 109,680.45 is: 164,520.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,163.20 : 585,244.81 = 109,680.45 : x
  2. Step 2: Convert to fraction form
    390,163.20/585,244.81 = 109,680.45/x
  3. Step 3: Cross multiply
    390,163.20x = 585,244.81 × 109,680.45
  4. Step 4: Simplify right side
    390,163.20x = 64,189,914,120.96
  5. Step 5: Solve for x
    x = 64,189,914,120.96/390,163.20
  6. Step 6: Final answer
    x = 164,520.68

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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.