Home / 78,674.86-118,022.58-28,778.45

Finding the Fourth Proportional to 78,674.86, 118,022.58 and 28,778.45

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Solution

The fourth proportional to 78,674.86, 118,022.58 and 28,778.45 is: 43,171.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,674.86 : 118,022.58 = 28,778.45 : x
  2. Step 2: Convert to fraction form
    78,674.86/118,022.58 = 28,778.45/x
  3. Step 3: Cross multiply
    78,674.86x = 118,022.58 × 28,778.45
  4. Step 4: Simplify right side
    78,674.86x = 3,396,506,917.40
  5. Step 5: Solve for x
    x = 3,396,506,917.40/78,674.86
  6. Step 6: Final answer
    x = 43,171.44

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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.