Home / 278,825.13-417,676.37-128,858.90

Finding the Fourth Proportional to 278,825.13, 417,676.37 and 128,858.90

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Solution

The fourth proportional to 278,825.13, 417,676.37 and 128,858.90 is: 193,028.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,825.13 : 417,676.37 = 128,858.90 : x
  2. Step 2: Convert to fraction form
    278,825.13/417,676.37 = 128,858.90/x
  3. Step 3: Cross multiply
    278,825.13x = 417,676.37 × 128,858.90
  4. Step 4: Simplify right side
    278,825.13x = 53,821,314,861.52
  5. Step 5: Solve for x
    x = 53,821,314,861.52/278,825.13
  6. Step 6: Final answer
    x = 193,028.92

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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.