Home / 78,975.54-118,338.77-28,986.86

Finding the Fourth Proportional to 78,975.54, 118,338.77 and 28,986.86

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Solution

The fourth proportional to 78,975.54, 118,338.77 and 28,986.86 is: 43,434.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,975.54 : 118,338.77 = 28,986.86 : x
  2. Step 2: Convert to fraction form
    78,975.54/118,338.77 = 28,986.86/x
  3. Step 3: Cross multiply
    78,975.54x = 118,338.77 × 28,986.86
  4. Step 4: Simplify right side
    78,975.54x = 3,430,269,726.88
  5. Step 5: Solve for x
    x = 3,430,269,726.88/78,975.54
  6. Step 6: Final answer
    x = 43,434.58

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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.