Home / 390,084.12-585,148.05-109,579.50

Finding the Fourth Proportional to 390,084.12, 585,148.05 and 109,579.50

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Solution

The fourth proportional to 390,084.12, 585,148.05 and 109,579.50 is: 164,375.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,084.12 : 585,148.05 = 109,579.50 : x
  2. Step 2: Convert to fraction form
    390,084.12/585,148.05 = 109,579.50/x
  3. Step 3: Cross multiply
    390,084.12x = 585,148.05 × 109,579.50
  4. Step 4: Simplify right side
    390,084.12x = 64,120,230,744.98
  5. Step 5: Solve for x
    x = 64,120,230,744.98/390,084.12
  6. Step 6: Final answer
    x = 164,375.39

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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.