Home / 209,105.78-288,566.35-113,612.58

Finding the Fourth Proportional to 209,105.78, 288,566.35 and 113,612.58

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Solution

The fourth proportional to 209,105.78, 288,566.35 and 113,612.58 is: 156,785.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,105.78 : 288,566.35 = 113,612.58 : x
  2. Step 2: Convert to fraction form
    209,105.78/288,566.35 = 113,612.58/x
  3. Step 3: Cross multiply
    209,105.78x = 288,566.35 × 113,612.58
  4. Step 4: Simplify right side
    209,105.78x = 32,784,767,240.65
  5. Step 5: Solve for x
    x = 32,784,767,240.65/209,105.78
  6. Step 6: Final answer
    x = 156,785.57

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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.