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Finding the Fourth Proportional to 142,090.20, 212,940.90 and 115,846.20

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Solution

The fourth proportional to 142,090.20, 212,940.90 and 115,846.20 is: 173,610.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,090.20 : 212,940.90 = 115,846.20 : x
  2. Step 2: Convert to fraction form
    142,090.20/212,940.90 = 115,846.20/x
  3. Step 3: Cross multiply
    142,090.20x = 212,940.90 × 115,846.20
  4. Step 4: Simplify right side
    142,090.20x = 24,668,394,089.58
  5. Step 5: Solve for x
    x = 24,668,394,089.58/142,090.20
  6. Step 6: Final answer
    x = 173,610.81

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1.5x scale

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.