Home / 78,089.24-117,135.30-28,173.08

Finding the Fourth Proportional to 78,089.24, 117,135.30 and 28,173.08

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Solution

The fourth proportional to 78,089.24, 117,135.30 and 28,173.08 is: 42,260.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,089.24 : 117,135.30 = 28,173.08 : x
  2. Step 2: Convert to fraction form
    78,089.24/117,135.30 = 28,173.08/x
  3. Step 3: Cross multiply
    78,089.24x = 117,135.30 × 28,173.08
  4. Step 4: Simplify right side
    78,089.24x = 3,300,062,177.72
  5. Step 5: Solve for x
    x = 3,300,062,177.72/78,089.24
  6. Step 6: Final answer
    x = 42,260.14

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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.