Home / 78,764.49-117,989.39-53,742.47

Finding the Fourth Proportional to 78,764.49, 117,989.39 and 53,742.47

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Solution

The fourth proportional to 78,764.49, 117,989.39 and 53,742.47 is: 80,506.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,764.49 : 117,989.39 = 53,742.47 : x
  2. Step 2: Convert to fraction form
    78,764.49/117,989.39 = 53,742.47/x
  3. Step 3: Cross multiply
    78,764.49x = 117,989.39 × 53,742.47
  4. Step 4: Simplify right side
    78,764.49x = 6,341,040,393.73
  5. Step 5: Solve for x
    x = 6,341,040,393.73/78,764.49
  6. Step 6: Final answer
    x = 80,506.33

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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.