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Finding the Fourth Proportional to 227,313.40, 340,970.10 and 138,739.90

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Solution

The fourth proportional to 227,313.40, 340,970.10 and 138,739.90 is: 208,109.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    227,313.40 : 340,970.10 = 138,739.90 : x
  2. Step 2: Convert to fraction form
    227,313.40/340,970.10 = 138,739.90/x
  3. Step 3: Cross multiply
    227,313.40x = 340,970.10 × 138,739.90
  4. Step 4: Simplify right side
    227,313.40x = 47,306,157,576.99
  5. Step 5: Solve for x
    x = 47,306,157,576.99/227,313.40
  6. Step 6: Final answer
    x = 208,109.85

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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.