Home / 84,718,907.70-127,078,361.55-81,131,680.95

Finding the Fourth Proportional to 84,718,907.70, 127,078,361.55 and 81,131,680.95

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Solution

The fourth proportional to 84,718,907.70, 127,078,361.55 and 81,131,680.95 is: 121,697,521.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,718,907.70 : 127,078,361.55 = 81,131,680.95 : x
  2. Step 2: Convert to fraction form
    84,718,907.70/127,078,361.55 = 81,131,680.95/x
  3. Step 3: Cross multiply
    84,718,907.70x = 127,078,361.55 × 81,131,680.95
  4. Step 4: Simplify right side
    84,718,907.70x = 10,310,081,084,923,348
  5. Step 5: Solve for x
    x = 10,310,081,084,923,348/84,718,907.70
  6. Step 6: Final answer
    x = 121,697,521.43

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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.