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Finding the Fourth Proportional to 123,203.84, 170,020.94 and 66,615.21

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Solution

The fourth proportional to 123,203.84, 170,020.94 and 66,615.21 is: 91,928.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,203.84 : 170,020.94 = 66,615.21 : x
  2. Step 2: Convert to fraction form
    123,203.84/170,020.94 = 66,615.21/x
  3. Step 3: Cross multiply
    123,203.84x = 170,020.94 × 66,615.21
  4. Step 4: Simplify right side
    123,203.84x = 11,325,980,289.42
  5. Step 5: Solve for x
    x = 11,325,980,289.42/123,203.84
  6. Step 6: Final answer
    x = 91,928.80

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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.