Home / 78,936.75-109,021.01-61,246.35

Finding the Fourth Proportional to 78,936.75, 109,021.01 and 61,246.35

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Solution

The fourth proportional to 78,936.75, 109,021.01 and 61,246.35 is: 84,588.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,936.75 : 109,021.01 = 61,246.35 : x
  2. Step 2: Convert to fraction form
    78,936.75/109,021.01 = 61,246.35/x
  3. Step 3: Cross multiply
    78,936.75x = 109,021.01 × 61,246.35
  4. Step 4: Simplify right side
    78,936.75x = 6,677,138,629.58
  5. Step 5: Solve for x
    x = 6,677,138,629.58/78,936.75
  6. Step 6: Final answer
    x = 84,588.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.