Home / 84,128.29-125,699.79-81,185.07

Finding the Fourth Proportional to 84,128.29, 125,699.79 and 81,185.07

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Solution

The fourth proportional to 84,128.29, 125,699.79 and 81,185.07 is: 121,302.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,128.29 : 125,699.79 = 81,185.07 : x
  2. Step 2: Convert to fraction form
    84,128.29/125,699.79 = 81,185.07/x
  3. Step 3: Cross multiply
    84,128.29x = 125,699.79 × 81,185.07
  4. Step 4: Simplify right side
    84,128.29x = 10,204,946,336.37
  5. Step 5: Solve for x
    x = 10,204,946,336.37/84,128.29
  6. Step 6: Final answer
    x = 121,302.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.