Home / 85,603,556.25-128,378,361.38-28,082,423.61

Finding the Fourth Proportional to 85,603,556.25, 128,378,361.38 and 28,082,423.61

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Solution

The fourth proportional to 85,603,556.25, 128,378,361.38 and 28,082,423.61 is: 42,114,786.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,603,556.25 : 128,378,361.38 = 28,082,423.61 : x
  2. Step 2: Convert to fraction form
    85,603,556.25/128,378,361.38 = 28,082,423.61/x
  3. Step 3: Cross multiply
    85,603,556.25x = 128,378,361.38 × 28,082,423.61
  4. Step 4: Simplify right side
    85,603,556.25x = 3,605,175,526,490,412
  5. Step 5: Solve for x
    x = 3,605,175,526,490,412/85,603,556.25
  6. Step 6: Final answer
    x = 42,114,786.87

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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.