Home / 142,728.41-196,977.21-79,072.13

Finding the Fourth Proportional to 142,728.41, 196,977.21 and 79,072.13

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Solution

The fourth proportional to 142,728.41, 196,977.21 and 79,072.13 is: 109,126.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,728.41 : 196,977.21 = 79,072.13 : x
  2. Step 2: Convert to fraction form
    142,728.41/196,977.21 = 79,072.13/x
  3. Step 3: Cross multiply
    142,728.41x = 196,977.21 × 79,072.13
  4. Step 4: Simplify right side
    142,728.41x = 15,575,407,556.16
  5. Step 5: Solve for x
    x = 15,575,407,556.16/142,728.41
  6. Step 6: Final answer
    x = 109,126.19

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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.