Home / 279,020.78-385,040.64-158,173.24

Finding the Fourth Proportional to 279,020.78, 385,040.64 and 158,173.24

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Solution

The fourth proportional to 279,020.78, 385,040.64 and 158,173.24 is: 218,274.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,020.78 : 385,040.64 = 158,173.24 : x
  2. Step 2: Convert to fraction form
    279,020.78/385,040.64 = 158,173.24/x
  3. Step 3: Cross multiply
    279,020.78x = 385,040.64 × 158,173.24
  4. Step 4: Simplify right side
    279,020.78x = 60,903,125,560.47
  5. Step 5: Solve for x
    x = 60,903,125,560.47/279,020.78
  6. Step 6: Final answer
    x = 218,274.52

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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.