Home / 78,739.92-118,109.40-28,823.49

Finding the Fourth Proportional to 78,739.92, 118,109.40 and 28,823.49

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Solution

The fourth proportional to 78,739.92, 118,109.40 and 28,823.49 is: 43,235.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,739.92 : 118,109.40 = 28,823.49 : x
  2. Step 2: Convert to fraction form
    78,739.92/118,109.40 = 28,823.49/x
  3. Step 3: Cross multiply
    78,739.92x = 118,109.40 × 28,823.49
  4. Step 4: Simplify right side
    78,739.92x = 3,404,325,109.81
  5. Step 5: Solve for x
    x = 3,404,325,109.81/78,739.92
  6. Step 6: Final answer
    x = 43,235.06

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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.