Home / 78,491,302.14-117,727,969.56-20,988,057.33

Finding the Fourth Proportional to 78,491,302.14, 117,727,969.56 and 20,988,057.33

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Solution

The fourth proportional to 78,491,302.14, 117,727,969.56 and 20,988,057.33 is: 31,479,683.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491,302.14 : 117,727,969.56 = 20,988,057.33 : x
  2. Step 2: Convert to fraction form
    78,491,302.14/117,727,969.56 = 20,988,057.33/x
  3. Step 3: Cross multiply
    78,491,302.14x = 117,727,969.56 × 20,988,057.33
  4. Step 4: Simplify right side
    78,491,302.14x = 2,470,881,374,469,774.50
  5. Step 5: Solve for x
    x = 2,470,881,374,469,774.50/78,491,302.14
  6. Step 6: Final answer
    x = 31,479,683.83

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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.