Home / 128,928.75-193,397.99-40,181.91

Finding the Fourth Proportional to 128,928.75, 193,397.99 and 40,181.91

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Solution

The fourth proportional to 128,928.75, 193,397.99 and 40,181.91 is: 60,274.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,928.75 : 193,397.99 = 40,181.91 : x
  2. Step 2: Convert to fraction form
    128,928.75/193,397.99 = 40,181.91/x
  3. Step 3: Cross multiply
    128,928.75x = 193,397.99 × 40,181.91
  4. Step 4: Simplify right side
    128,928.75x = 7,771,100,427.45
  5. Step 5: Solve for x
    x = 7,771,100,427.45/128,928.75
  6. Step 6: Final answer
    x = 60,274.38

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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.