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Finding the Fourth Proportional to 193,142.70, 290,042.10 and 143,279.10

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Solution

The fourth proportional to 193,142.70, 290,042.10 and 143,279.10 is: 215,162.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,142.70 : 290,042.10 = 143,279.10 : x
  2. Step 2: Convert to fraction form
    193,142.70/290,042.10 = 143,279.10/x
  3. Step 3: Cross multiply
    193,142.70x = 290,042.10 × 143,279.10
  4. Step 4: Simplify right side
    193,142.70x = 41,556,971,050.11
  5. Step 5: Solve for x
    x = 41,556,971,050.11/193,142.70
  6. Step 6: Final answer
    x = 215,162.01

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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.