Home / 86,022.68-128,971.10-57,872.75

Finding the Fourth Proportional to 86,022.68, 128,971.10 and 57,872.75

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Solution

The fourth proportional to 86,022.68, 128,971.10 and 57,872.75 is: 86,766.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,022.68 : 128,971.10 = 57,872.75 : x
  2. Step 2: Convert to fraction form
    86,022.68/128,971.10 = 57,872.75/x
  3. Step 3: Cross multiply
    86,022.68x = 128,971.10 × 57,872.75
  4. Step 4: Simplify right side
    86,022.68x = 7,463,911,727.35
  5. Step 5: Solve for x
    x = 7,463,911,727.35/86,022.68
  6. Step 6: Final answer
    x = 86,766.79

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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.