Home / 256,396.86-384,631.74-78,918.66

Finding the Fourth Proportional to 256,396.86, 384,631.74 and 78,918.66

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Solution

The fourth proportional to 256,396.86, 384,631.74 and 78,918.66 is: 118,389.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,396.86 : 384,631.74 = 78,918.66 : x
  2. Step 2: Convert to fraction form
    256,396.86/384,631.74 = 78,918.66/x
  3. Step 3: Cross multiply
    256,396.86x = 384,631.74 × 78,918.66
  4. Step 4: Simplify right side
    256,396.86x = 30,354,621,514.27
  5. Step 5: Solve for x
    x = 30,354,621,514.27/256,396.86
  6. Step 6: Final answer
    x = 118,389.21

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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.