Home / 123,213.49-170,002.40-72,198.88

Finding the Fourth Proportional to 123,213.49, 170,002.40 and 72,198.88

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Solution

The fourth proportional to 123,213.49, 170,002.40 and 72,198.88 is: 99,615.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,213.49 : 170,002.40 = 72,198.88 : x
  2. Step 2: Convert to fraction form
    123,213.49/170,002.40 = 72,198.88/x
  3. Step 3: Cross multiply
    123,213.49x = 170,002.40 × 72,198.88
  4. Step 4: Simplify right side
    123,213.49x = 12,273,982,091.31
  5. Step 5: Solve for x
    x = 12,273,982,091.31/123,213.49
  6. Step 6: Final answer
    x = 99,615.57

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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.