Home / 129,289.20-178,440.32-75,563.72

Finding the Fourth Proportional to 129,289.20, 178,440.32 and 75,563.72

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Solution

The fourth proportional to 129,289.20, 178,440.32 and 75,563.72 is: 104,290.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,289.20 : 178,440.32 = 75,563.72 : x
  2. Step 2: Convert to fraction form
    129,289.20/178,440.32 = 75,563.72/x
  3. Step 3: Cross multiply
    129,289.20x = 178,440.32 × 75,563.72
  4. Step 4: Simplify right side
    129,289.20x = 13,483,613,107.17
  5. Step 5: Solve for x
    x = 13,483,613,107.17/129,289.20
  6. Step 6: Final answer
    x = 104,290.33

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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.