Home / 78,172.21-117,258.36-19,007.92

Finding the Fourth Proportional to 78,172.21, 117,258.36 and 19,007.92

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Solution

The fourth proportional to 78,172.21, 117,258.36 and 19,007.92 is: 28,511.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,172.21 : 117,258.36 = 19,007.92 : x
  2. Step 2: Convert to fraction form
    78,172.21/117,258.36 = 19,007.92/x
  3. Step 3: Cross multiply
    78,172.21x = 117,258.36 × 19,007.92
  4. Step 4: Simplify right side
    78,172.21x = 2,228,837,526.21
  5. Step 5: Solve for x
    x = 2,228,837,526.21/78,172.21
  6. Step 6: Final answer
    x = 28,511.89

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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.