Home / 68,899,520.72-103,350,121.65-20,378,355.12

Finding the Fourth Proportional to 68,899,520.72, 103,350,121.65 and 20,378,355.12

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Solution

The fourth proportional to 68,899,520.72, 103,350,121.65 and 20,378,355.12 is: 30,567,781.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,899,520.72 : 103,350,121.65 = 20,378,355.12 : x
  2. Step 2: Convert to fraction form
    68,899,520.72/103,350,121.65 = 20,378,355.12/x
  3. Step 3: Cross multiply
    68,899,520.72x = 103,350,121.65 × 20,378,355.12
  4. Step 4: Simplify right side
    68,899,520.72x = 2,106,105,480,678,900.50
  5. Step 5: Solve for x
    x = 2,106,105,480,678,900.50/68,899,520.72
  6. Step 6: Final answer
    x = 30,567,781.29

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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.