Home / 78,747.96-118,145.78-28,140.36

Finding the Fourth Proportional to 78,747.96, 118,145.78 and 28,140.36

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Solution

The fourth proportional to 78,747.96, 118,145.78 and 28,140.36 is: 42,219.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,747.96 : 118,145.78 = 28,140.36 : x
  2. Step 2: Convert to fraction form
    78,747.96/118,145.78 = 28,140.36/x
  3. Step 3: Cross multiply
    78,747.96x = 118,145.78 × 28,140.36
  4. Step 4: Simplify right side
    78,747.96x = 3,324,664,781.68
  5. Step 5: Solve for x
    x = 3,324,664,781.68/78,747.96
  6. Step 6: Final answer
    x = 42,219.06

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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.