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Finding the Fourth Proportional to 128,976.19, 193,333.03 and 119,429.93

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Solution

The fourth proportional to 128,976.19, 193,333.03 and 119,429.93 is: 179,023.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,976.19 : 193,333.03 = 119,429.93 : x
  2. Step 2: Convert to fraction form
    128,976.19/193,333.03 = 119,429.93/x
  3. Step 3: Cross multiply
    128,976.19x = 193,333.03 × 119,429.93
  4. Step 4: Simplify right side
    128,976.19x = 23,089,750,424.35
  5. Step 5: Solve for x
    x = 23,089,750,424.35/128,976.19
  6. Step 6: Final answer
    x = 179,023.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.