Home / 86,628.63-129,865.19-31,185.75

Finding the Fourth Proportional to 86,628.63, 129,865.19 and 31,185.75

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Solution

The fourth proportional to 86,628.63, 129,865.19 and 31,185.75 is: 46,750.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,628.63 : 129,865.19 = 31,185.75 : x
  2. Step 2: Convert to fraction form
    86,628.63/129,865.19 = 31,185.75/x
  3. Step 3: Cross multiply
    86,628.63x = 129,865.19 × 31,185.75
  4. Step 4: Simplify right side
    86,628.63x = 4,049,943,193.11
  5. Step 5: Solve for x
    x = 4,049,943,193.11/86,628.63
  6. Step 6: Final answer
    x = 46,750.63

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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.