Home / 78,064.93-117,084.08-28,135.09

Finding the Fourth Proportional to 78,064.93, 117,084.08 and 28,135.09

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Solution

The fourth proportional to 78,064.93, 117,084.08 and 28,135.09 is: 42,197.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,064.93 : 117,084.08 = 28,135.09 : x
  2. Step 2: Convert to fraction form
    78,064.93/117,084.08 = 28,135.09/x
  3. Step 3: Cross multiply
    78,064.93x = 117,084.08 × 28,135.09
  4. Step 4: Simplify right side
    78,064.93x = 3,294,170,987.69
  5. Step 5: Solve for x
    x = 3,294,170,987.69/78,064.93
  6. Step 6: Final answer
    x = 42,197.83

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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.