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Finding the Fourth Proportional to 123,201, 170,017.38 and 66,612.38

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Solution

The fourth proportional to 123,201, 170,017.38 and 66,612.38 is: 91,925.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,201 : 170,017.38 = 66,612.38 : x
  2. Step 2: Convert to fraction form
    123,201/170,017.38 = 66,612.38/x
  3. Step 3: Cross multiply
    123,201x = 170,017.38 × 66,612.38
  4. Step 4: Simplify right side
    123,201x = 11,325,261,473.08
  5. Step 5: Solve for x
    x = 11,325,261,473.08/123,201
  6. Step 6: Final answer
    x = 91,925.08

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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.