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Finding the Fourth Proportional to 229,994.97, 317,396.64 and 128,021.54

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Solution

The fourth proportional to 229,994.97, 317,396.64 and 128,021.54 is: 176,671.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,994.97 : 317,396.64 = 128,021.54 : x
  2. Step 2: Convert to fraction form
    229,994.97/317,396.64 = 128,021.54/x
  3. Step 3: Cross multiply
    229,994.97x = 317,396.64 × 128,021.54
  4. Step 4: Simplify right side
    229,994.97x = 40,633,605,536.72
  5. Step 5: Solve for x
    x = 40,633,605,536.72/229,994.97
  6. Step 6: Final answer
    x = 176,671.72

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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.