Home / 78,301.76-117,451.20-19,136.48

Finding the Fourth Proportional to 78,301.76, 117,451.20 and 19,136.48

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Solution

The fourth proportional to 78,301.76, 117,451.20 and 19,136.48 is: 28,704.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,301.76 : 117,451.20 = 19,136.48 : x
  2. Step 2: Convert to fraction form
    78,301.76/117,451.20 = 19,136.48/x
  3. Step 3: Cross multiply
    78,301.76x = 117,451.20 × 19,136.48
  4. Step 4: Simplify right side
    78,301.76x = 2,247,602,539.78
  5. Step 5: Solve for x
    x = 2,247,602,539.78/78,301.76
  6. Step 6: Final answer
    x = 28,704.37

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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.