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Finding the Fourth Proportional to 78,099.01, 117,147.48 and 18,935.22

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Solution

The fourth proportional to 78,099.01, 117,147.48 and 18,935.22 is: 28,402.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,099.01 : 117,147.48 = 18,935.22 : x
  2. Step 2: Convert to fraction form
    78,099.01/117,147.48 = 18,935.22/x
  3. Step 3: Cross multiply
    78,099.01x = 117,147.48 × 18,935.22
  4. Step 4: Simplify right side
    78,099.01x = 2,218,213,306.25
  5. Step 5: Solve for x
    x = 2,218,213,306.25/78,099.01
  6. Step 6: Final answer
    x = 28,402.58

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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.