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Finding the Fourth Proportional to 123,309.84, 170,167.74 and 66,721.22

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Solution

The fourth proportional to 123,309.84, 170,167.74 and 66,721.22 is: 92,075.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,309.84 : 170,167.74 = 66,721.22 : x
  2. Step 2: Convert to fraction form
    123,309.84/170,167.74 = 66,721.22/x
  3. Step 3: Cross multiply
    123,309.84x = 170,167.74 × 66,721.22
  4. Step 4: Simplify right side
    123,309.84x = 11,353,798,754.53
  5. Step 5: Solve for x
    x = 11,353,798,754.53/123,309.84
  6. Step 6: Final answer
    x = 92,075.36

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1.5x scale

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.