Home / 78,678.41-117,880.93-70,969.24

Finding the Fourth Proportional to 78,678.41, 117,880.93 and 70,969.24

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Solution

The fourth proportional to 78,678.41, 117,880.93 and 70,969.24 is: 106,330.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,678.41 : 117,880.93 = 70,969.24 : x
  2. Step 2: Convert to fraction form
    78,678.41/117,880.93 = 70,969.24/x
  3. Step 3: Cross multiply
    78,678.41x = 117,880.93 × 70,969.24
  4. Step 4: Simplify right side
    78,678.41x = 8,365,919,540.47
  5. Step 5: Solve for x
    x = 8,365,919,540.47/78,678.41
  6. Step 6: Final answer
    x = 106,330.56

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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.