Home / 86,849.25-130,273.88-21,185.25

Finding the Fourth Proportional to 86,849.25, 130,273.88 and 21,185.25

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Solution

The fourth proportional to 86,849.25, 130,273.88 and 21,185.25 is: 31,777.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,849.25 : 130,273.88 = 21,185.25 : x
  2. Step 2: Convert to fraction form
    86,849.25/130,273.88 = 21,185.25/x
  3. Step 3: Cross multiply
    86,849.25x = 130,273.88 × 21,185.25
  4. Step 4: Simplify right side
    86,849.25x = 2,759,884,610.34
  5. Step 5: Solve for x
    x = 2,759,884,610.34/86,849.25
  6. Step 6: Final answer
    x = 31,777.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.