Home / 77,940.09-107,472.69-49,609.53

Finding the Fourth Proportional to 77,940.09, 107,472.69 and 49,609.53

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Solution

The fourth proportional to 77,940.09, 107,472.69 and 49,609.53 is: 68,407.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,940.09 : 107,472.69 = 49,609.53 : x
  2. Step 2: Convert to fraction form
    77,940.09/107,472.69 = 49,609.53/x
  3. Step 3: Cross multiply
    77,940.09x = 107,472.69 × 49,609.53
  4. Step 4: Simplify right side
    77,940.09x = 5,331,669,638.74
  5. Step 5: Solve for x
    x = 5,331,669,638.74/77,940.09
  6. Step 6: Final answer
    x = 68,407.28

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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.