Home / 78,190.38-117,241.13-30,779.79

Finding the Fourth Proportional to 78,190.38, 117,241.13 and 30,779.79

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Solution

The fourth proportional to 78,190.38, 117,241.13 and 30,779.79 is: 46,152.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,190.38 : 117,241.13 = 30,779.79 : x
  2. Step 2: Convert to fraction form
    78,190.38/117,241.13 = 30,779.79/x
  3. Step 3: Cross multiply
    78,190.38x = 117,241.13 × 30,779.79
  4. Step 4: Simplify right side
    78,190.38x = 3,608,657,646.52
  5. Step 5: Solve for x
    x = 3,608,657,646.52/78,190.38
  6. Step 6: Final answer
    x = 46,152.20

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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.