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Finding the Fourth Proportional to 192,400.40, 288,017.40 and 139,912.40

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Solution

The fourth proportional to 192,400.40, 288,017.40 and 139,912.40 is: 209,444.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,400.40 : 288,017.40 = 139,912.40 : x
  2. Step 2: Convert to fraction form
    192,400.40/288,017.40 = 139,912.40/x
  3. Step 3: Cross multiply
    192,400.40x = 288,017.40 × 139,912.40
  4. Step 4: Simplify right side
    192,400.40x = 40,297,205,675.76
  5. Step 5: Solve for x
    x = 40,297,205,675.76/192,400.40
  6. Step 6: Final answer
    x = 209,444.50

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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.