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Finding the Fourth Proportional to 192,344.40, 288,516.60 and 85,728.15

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Solution

The fourth proportional to 192,344.40, 288,516.60 and 85,728.15 is: 128,592.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,344.40 : 288,516.60 = 85,728.15 : x
  2. Step 2: Convert to fraction form
    192,344.40/288,516.60 = 85,728.15/x
  3. Step 3: Cross multiply
    192,344.40x = 288,516.60 × 85,728.15
  4. Step 4: Simplify right side
    192,344.40x = 24,733,994,362.29
  5. Step 5: Solve for x
    x = 24,733,994,362.29/192,344.40
  6. Step 6: Final answer
    x = 128,592.23

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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.