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Finding the Fourth Proportional to 192,085.80, 288,128.70 and 122,015.40

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Solution

The fourth proportional to 192,085.80, 288,128.70 and 122,015.40 is: 183,023.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,085.80 : 288,128.70 = 122,015.40 : x
  2. Step 2: Convert to fraction form
    192,085.80/288,128.70 = 122,015.40/x
  3. Step 3: Cross multiply
    192,085.80x = 288,128.70 × 122,015.40
  4. Step 4: Simplify right side
    192,085.80x = 35,156,138,581.98
  5. Step 5: Solve for x
    x = 35,156,138,581.98/192,085.80
  6. Step 6: Final answer
    x = 183,023.10

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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.