Home / 209,105.78-288,566.28-113,612.45

Finding the Fourth Proportional to 209,105.78, 288,566.28 and 113,612.45

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Solution

The fourth proportional to 209,105.78, 288,566.28 and 113,612.45 is: 156,785.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,105.78 : 288,566.28 = 113,612.45 : x
  2. Step 2: Convert to fraction form
    209,105.78/288,566.28 = 113,612.45/x
  3. Step 3: Cross multiply
    209,105.78x = 288,566.28 × 113,612.45
  4. Step 4: Simplify right side
    209,105.78x = 32,784,720,615.35
  5. Step 5: Solve for x
    x = 32,784,720,615.35/209,105.78
  6. Step 6: Final answer
    x = 156,785.34

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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.