Home / 78,072.21-107,650.49-62,157.33

Finding the Fourth Proportional to 78,072.21, 107,650.49 and 62,157.33

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Solution

The fourth proportional to 78,072.21, 107,650.49 and 62,157.33 is: 85,706.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,072.21 : 107,650.49 = 62,157.33 : x
  2. Step 2: Convert to fraction form
    78,072.21/107,650.49 = 62,157.33/x
  3. Step 3: Cross multiply
    78,072.21x = 107,650.49 × 62,157.33
  4. Step 4: Simplify right side
    78,072.21x = 6,691,266,720.81
  5. Step 5: Solve for x
    x = 6,691,266,720.81/78,072.21
  6. Step 6: Final answer
    x = 85,706.13

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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.