Home / 86,780.75-130,121.31-34,161.53

Finding the Fourth Proportional to 86,780.75, 130,121.31 and 34,161.53

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Solution

The fourth proportional to 86,780.75, 130,121.31 and 34,161.53 is: 51,222.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,780.75 : 130,121.31 = 34,161.53 : x
  2. Step 2: Convert to fraction form
    86,780.75/130,121.31 = 34,161.53/x
  3. Step 3: Cross multiply
    86,780.75x = 130,121.31 × 34,161.53
  4. Step 4: Simplify right side
    86,780.75x = 4,445,143,035.20
  5. Step 5: Solve for x
    x = 4,445,143,035.20/86,780.75
  6. Step 6: Final answer
    x = 51,222.69

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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.