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Finding the Fourth Proportional to 192,446.40, 288,086.40 and 139,958.40

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Solution

The fourth proportional to 192,446.40, 288,086.40 and 139,958.40 is: 209,513.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,446.40 : 288,086.40 = 139,958.40 : x
  2. Step 2: Convert to fraction form
    192,446.40/288,086.40 = 139,958.40/x
  3. Step 3: Cross multiply
    192,446.40x = 288,086.40 × 139,958.40
  4. Step 4: Simplify right side
    192,446.40x = 40,320,111,605.76
  5. Step 5: Solve for x
    x = 40,320,111,605.76/192,446.40
  6. Step 6: Final answer
    x = 209,513.46

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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.