Home / 256,397.56-384,632.78-78,919.36

Finding the Fourth Proportional to 256,397.56, 384,632.78 and 78,919.36

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Solution

The fourth proportional to 256,397.56, 384,632.78 and 78,919.36 is: 118,390.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,397.56 : 384,632.78 = 78,919.36 : x
  2. Step 2: Convert to fraction form
    256,397.56/384,632.78 = 78,919.36/x
  3. Step 3: Cross multiply
    256,397.56x = 384,632.78 × 78,919.36
  4. Step 4: Simplify right side
    256,397.56x = 30,354,972,832.62
  5. Step 5: Solve for x
    x = 30,354,972,832.62/256,397.56
  6. Step 6: Final answer
    x = 118,390.26

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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.