Home / 86,979.37-120,020.31-51,156.31

Finding the Fourth Proportional to 86,979.37, 120,020.31 and 51,156.31

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Solution

The fourth proportional to 86,979.37, 120,020.31 and 51,156.31 is: 70,589.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,979.37 : 120,020.31 = 51,156.31 : x
  2. Step 2: Convert to fraction form
    86,979.37/120,020.31 = 51,156.31/x
  3. Step 3: Cross multiply
    86,979.37x = 120,020.31 × 51,156.31
  4. Step 4: Simplify right side
    86,979.37x = 6,139,795,584.55
  5. Step 5: Solve for x
    x = 6,139,795,584.55/86,979.37
  6. Step 6: Final answer
    x = 70,589.11

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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.