Home / 128,918.78-193,377.59-40,172.34

Finding the Fourth Proportional to 128,918.78, 193,377.59 and 40,172.34

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Solution

The fourth proportional to 128,918.78, 193,377.59 and 40,172.34 is: 60,258.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,918.78 : 193,377.59 = 40,172.34 : x
  2. Step 2: Convert to fraction form
    128,918.78/193,377.59 = 40,172.34/x
  3. Step 3: Cross multiply
    128,918.78x = 193,377.59 × 40,172.34
  4. Step 4: Simplify right side
    128,918.78x = 7,768,430,293.86
  5. Step 5: Solve for x
    x = 7,768,430,293.86/128,918.78
  6. Step 6: Final answer
    x = 60,258.33

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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.