Home / 390,154.25-585,231.37-109,671.50

Finding the Fourth Proportional to 390,154.25, 585,231.37 and 109,671.50

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Solution

The fourth proportional to 390,154.25, 585,231.37 and 109,671.50 is: 164,507.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,154.25 : 585,231.37 = 109,671.50 : x
  2. Step 2: Convert to fraction form
    390,154.25/585,231.37 = 109,671.50/x
  3. Step 3: Cross multiply
    390,154.25x = 585,231.37 × 109,671.50
  4. Step 4: Simplify right side
    390,154.25x = 64,183,203,383.85
  5. Step 5: Solve for x
    x = 64,183,203,383.85/390,154.25
  6. Step 6: Final answer
    x = 164,507.25

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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.