Home / 78,860.18-118,191.83-39,428.57

Finding the Fourth Proportional to 78,860.18, 118,191.83 and 39,428.57

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Solution

The fourth proportional to 78,860.18, 118,191.83 and 39,428.57 is: 59,093.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,860.18 : 118,191.83 = 39,428.57 : x
  2. Step 2: Convert to fraction form
    78,860.18/118,191.83 = 39,428.57/x
  3. Step 3: Cross multiply
    78,860.18x = 118,191.83 × 39,428.57
  4. Step 4: Simplify right side
    78,860.18x = 4,660,135,273.60
  5. Step 5: Solve for x
    x = 4,660,135,273.60/78,860.18
  6. Step 6: Final answer
    x = 59,093.64

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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.