Home / 78,087.54-117,177.96-71,735.16

Finding the Fourth Proportional to 78,087.54, 117,177.96 and 71,735.16

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Solution

The fourth proportional to 78,087.54, 117,177.96 and 71,735.16 is: 107,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,087.54 : 117,177.96 = 71,735.16 : x
  2. Step 2: Convert to fraction form
    78,087.54/117,177.96 = 71,735.16/x
  3. Step 3: Cross multiply
    78,087.54x = 117,177.96 × 71,735.16
  4. Step 4: Simplify right side
    78,087.54x = 8,405,779,709.07
  5. Step 5: Solve for x
    x = 8,405,779,709.07/78,087.54
  6. Step 6: Final answer
    x = 107,645.60

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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.