Home / 278,557.44-417,782.72-78,829.60

Finding the Fourth Proportional to 278,557.44, 417,782.72 and 78,829.60

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Solution

The fourth proportional to 278,557.44, 417,782.72 and 78,829.60 is: 118,229.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,557.44 : 417,782.72 = 78,829.60 : x
  2. Step 2: Convert to fraction form
    278,557.44/417,782.72 = 78,829.60/x
  3. Step 3: Cross multiply
    278,557.44x = 417,782.72 × 78,829.60
  4. Step 4: Simplify right side
    278,557.44x = 32,933,644,704.51
  5. Step 5: Solve for x
    x = 32,933,644,704.51/278,557.44
  6. Step 6: Final answer
    x = 118,229.28

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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.