Home / 78,330.85-117,492.63-19,163.39

Finding the Fourth Proportional to 78,330.85, 117,492.63 and 19,163.39

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Solution

The fourth proportional to 78,330.85, 117,492.63 and 19,163.39 is: 28,744.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,330.85 : 117,492.63 = 19,163.39 : x
  2. Step 2: Convert to fraction form
    78,330.85/117,492.63 = 19,163.39/x
  3. Step 3: Cross multiply
    78,330.85x = 117,492.63 × 19,163.39
  4. Step 4: Simplify right side
    78,330.85x = 2,251,556,431.49
  5. Step 5: Solve for x
    x = 2,251,556,431.49/78,330.85
  6. Step 6: Final answer
    x = 28,744.19

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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.