Home / 86,143.31-129,217.39-23,813.81

Finding the Fourth Proportional to 86,143.31, 129,217.39 and 23,813.81

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Solution

The fourth proportional to 86,143.31, 129,217.39 and 23,813.81 is: 35,721.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,143.31 : 129,217.39 = 23,813.81 : x
  2. Step 2: Convert to fraction form
    86,143.31/129,217.39 = 23,813.81/x
  3. Step 3: Cross multiply
    86,143.31x = 129,217.39 × 23,813.81
  4. Step 4: Simplify right side
    86,143.31x = 3,077,157,668.53
  5. Step 5: Solve for x
    x = 3,077,157,668.53/86,143.31
  6. Step 6: Final answer
    x = 35,721.38

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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.