Home / 78,440.84-117,660.23-19,277.03

Finding the Fourth Proportional to 78,440.84, 117,660.23 and 19,277.03

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Solution

The fourth proportional to 78,440.84, 117,660.23 and 19,277.03 is: 28,915.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,440.84 : 117,660.23 = 19,277.03 : x
  2. Step 2: Convert to fraction form
    78,440.84/117,660.23 = 19,277.03/x
  3. Step 3: Cross multiply
    78,440.84x = 117,660.23 × 19,277.03
  4. Step 4: Simplify right side
    78,440.84x = 2,268,139,687.13
  5. Step 5: Solve for x
    x = 2,268,139,687.13/78,440.84
  6. Step 6: Final answer
    x = 28,915.29

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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.