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Finding the Fourth Proportional to 118,628.75, 178,768.37 and 107,387.51

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Solution

The fourth proportional to 118,628.75, 178,768.37 and 107,387.51 is: 161,828.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,628.75 : 178,768.37 = 107,387.51 : x
  2. Step 2: Convert to fraction form
    118,628.75/178,768.37 = 107,387.51/x
  3. Step 3: Cross multiply
    118,628.75x = 178,768.37 × 107,387.51
  4. Step 4: Simplify right side
    118,628.75x = 19,197,488,690.28
  5. Step 5: Solve for x
    x = 19,197,488,690.28/118,628.75
  6. Step 6: Final answer
    x = 161,828.30

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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.