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Finding the Fourth Proportional to 123,158.97, 169,959.42 and 66,570.35

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Solution

The fourth proportional to 123,158.97, 169,959.42 and 66,570.35 is: 91,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,158.97 : 169,959.42 = 66,570.35 : x
  2. Step 2: Convert to fraction form
    123,158.97/169,959.42 = 66,570.35/x
  3. Step 3: Cross multiply
    123,158.97x = 169,959.42 × 66,570.35
  4. Step 4: Simplify right side
    123,158.97x = 11,314,257,225.40
  5. Step 5: Solve for x
    x = 11,314,257,225.40/123,158.97
  6. Step 6: Final answer
    x = 91,867.10

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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.