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Finding the Fourth Proportional to 79,686, 109,981.44 and 46,152

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Solution

The fourth proportional to 79,686, 109,981.44 and 46,152 is: 63,698.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,686 : 109,981.44 = 46,152 : x
  2. Step 2: Convert to fraction form
    79,686/109,981.44 = 46,152/x
  3. Step 3: Cross multiply
    79,686x = 109,981.44 × 46,152
  4. Step 4: Simplify right side
    79,686x = 5,075,863,418.88
  5. Step 5: Solve for x
    x = 5,075,863,418.88/79,686
  6. Step 6: Final answer
    x = 63,698.31

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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.