Home / 142,649.19-196,839.99-78,971.04

Finding the Fourth Proportional to 142,649.19, 196,839.99 and 78,971.04

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Solution

The fourth proportional to 142,649.19, 196,839.99 and 78,971.04 is: 108,971.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,649.19 : 196,839.99 = 78,971.04 : x
  2. Step 2: Convert to fraction form
    142,649.19/196,839.99 = 78,971.04/x
  3. Step 3: Cross multiply
    142,649.19x = 196,839.99 × 78,971.04
  4. Step 4: Simplify right side
    142,649.19x = 15,544,658,723.89
  5. Step 5: Solve for x
    x = 15,544,658,723.89/142,649.19
  6. Step 6: Final answer
    x = 108,971.24

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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.