Home / 78,023.78-117,035.67-18,859.43

Finding the Fourth Proportional to 78,023.78, 117,035.67 and 18,859.43

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Solution

The fourth proportional to 78,023.78, 117,035.67 and 18,859.43 is: 28,289.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,023.78 : 117,035.67 = 18,859.43 : x
  2. Step 2: Convert to fraction form
    78,023.78/117,035.67 = 18,859.43/x
  3. Step 3: Cross multiply
    78,023.78x = 117,035.67 × 18,859.43
  4. Step 4: Simplify right side
    78,023.78x = 2,207,226,025.87
  5. Step 5: Solve for x
    x = 2,207,226,025.87/78,023.78
  6. Step 6: Final answer
    x = 28,289.15

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1.5x scale

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.