Home / 78,727.70-118,079.37-28,796.12

Finding the Fourth Proportional to 78,727.70, 118,079.37 and 28,796.12

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Solution

The fourth proportional to 78,727.70, 118,079.37 and 28,796.12 is: 43,189.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,727.70 : 118,079.37 = 28,796.12 : x
  2. Step 2: Convert to fraction form
    78,727.70/118,079.37 = 28,796.12/x
  3. Step 3: Cross multiply
    78,727.70x = 118,079.37 × 28,796.12
  4. Step 4: Simplify right side
    78,727.70x = 3,400,227,708.04
  5. Step 5: Solve for x
    x = 3,400,227,708.04/78,727.70
  6. Step 6: Final answer
    x = 43,189.72

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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.