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Finding the Fourth Proportional to 87,645, 120,950.10 and 49,941.12

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Solution

The fourth proportional to 87,645, 120,950.10 and 49,941.12 is: 68,918.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,645 : 120,950.10 = 49,941.12 : x
  2. Step 2: Convert to fraction form
    87,645/120,950.10 = 49,941.12/x
  3. Step 3: Cross multiply
    87,645x = 120,950.10 × 49,941.12
  4. Step 4: Simplify right side
    87,645x = 6,040,383,458.11
  5. Step 5: Solve for x
    x = 6,040,383,458.11/87,645
  6. Step 6: Final answer
    x = 68,918.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.