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Finding the Fourth Proportional to 218,915.90, 302,104.30 and 123,422.34

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Solution

The fourth proportional to 218,915.90, 302,104.30 and 123,422.34 is: 170,323.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,915.90 : 302,104.30 = 123,422.34 : x
  2. Step 2: Convert to fraction form
    218,915.90/302,104.30 = 123,422.34/x
  3. Step 3: Cross multiply
    218,915.90x = 302,104.30 × 123,422.34
  4. Step 4: Simplify right side
    218,915.90x = 37,286,419,630.06
  5. Step 5: Solve for x
    x = 37,286,419,630.06/218,915.90
  6. Step 6: Final answer
    x = 170,323.03

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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.