Home / 278,220.96-416,774.88-128,256.12

Finding the Fourth Proportional to 278,220.96, 416,774.88 and 128,256.12

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Solution

The fourth proportional to 278,220.96, 416,774.88 and 128,256.12 is: 192,127.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,220.96 : 416,774.88 = 128,256.12 : x
  2. Step 2: Convert to fraction form
    278,220.96/416,774.88 = 128,256.12/x
  3. Step 3: Cross multiply
    278,220.96x = 416,774.88 × 128,256.12
  4. Step 4: Simplify right side
    278,220.96x = 53,453,929,022.27
  5. Step 5: Solve for x
    x = 53,453,929,022.27/278,220.96
  6. Step 6: Final answer
    x = 192,127.61

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1.5x scale

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.