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Finding the Fourth Proportional to 339,765.10, 509,647.65 and 103,107.40

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Solution

The fourth proportional to 339,765.10, 509,647.65 and 103,107.40 is: 154,661.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,765.10 : 509,647.65 = 103,107.40 : x
  2. Step 2: Convert to fraction form
    339,765.10/509,647.65 = 103,107.40/x
  3. Step 3: Cross multiply
    339,765.10x = 509,647.65 × 103,107.40
  4. Step 4: Simplify right side
    339,765.10x = 52,548,444,107.61
  5. Step 5: Solve for x
    x = 52,548,444,107.61/339,765.10
  6. Step 6: Final answer
    x = 154,661.10

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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.