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Finding the Fourth Proportional to 123,075, 169,843.50 and 66,486.40

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Solution

The fourth proportional to 123,075, 169,843.50 and 66,486.40 is: 91,751.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,075 : 169,843.50 = 66,486.40 : x
  2. Step 2: Convert to fraction form
    123,075/169,843.50 = 66,486.40/x
  3. Step 3: Cross multiply
    123,075x = 169,843.50 × 66,486.40
  4. Step 4: Simplify right side
    123,075x = 11,292,282,878.40
  5. Step 5: Solve for x
    x = 11,292,282,878.40/123,075
  6. Step 6: Final answer
    x = 91,751.23

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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.