Home / 78,477,538.23-117,428,403.56-65,491,632.41

Finding the Fourth Proportional to 78,477,538.23, 117,428,403.56 and 65,491,632.41

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Solution

The fourth proportional to 78,477,538.23, 117,428,403.56 and 65,491,632.41 is: 97,997,185.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,477,538.23 : 117,428,403.56 = 65,491,632.41 : x
  2. Step 2: Convert to fraction form
    78,477,538.23/117,428,403.56 = 65,491,632.41/x
  3. Step 3: Cross multiply
    78,477,538.23x = 117,428,403.56 × 65,491,632.41
  4. Step 4: Simplify right side
    78,477,538.23x = 7,690,577,839,530,056
  5. Step 5: Solve for x
    x = 7,690,577,839,530,056/78,477,538.23
  6. Step 6: Final answer
    x = 97,997,185.09

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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.