Home / 127,138.78-191,469.52-115,788.59

Finding the Fourth Proportional to 127,138.78, 191,469.52 and 115,788.59

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Solution

The fourth proportional to 127,138.78, 191,469.52 and 115,788.59 is: 174,376.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,138.78 : 191,469.52 = 115,788.59 : x
  2. Step 2: Convert to fraction form
    127,138.78/191,469.52 = 115,788.59/x
  3. Step 3: Cross multiply
    127,138.78x = 191,469.52 × 115,788.59
  4. Step 4: Simplify right side
    127,138.78x = 22,169,985,748.78
  5. Step 5: Solve for x
    x = 22,169,985,748.78/127,138.78
  6. Step 6: Final answer
    x = 174,376.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.