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Finding the Fourth Proportional to 262,336,613.80, 393,504,920.70 and 80,592,831.40

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Solution

The fourth proportional to 262,336,613.80, 393,504,920.70 and 80,592,831.40 is: 120,889,247.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,336,613.80 : 393,504,920.70 = 80,592,831.40 : x
  2. Step 2: Convert to fraction form
    262,336,613.80/393,504,920.70 = 80,592,831.40/x
  3. Step 3: Cross multiply
    262,336,613.80x = 393,504,920.70 × 80,592,831.40
  4. Step 4: Simplify right side
    262,336,613.80x = 31,713,675,729,045,472
  5. Step 5: Solve for x
    x = 31,713,675,729,045,472/262,336,613.80
  6. Step 6: Final answer
    x = 120,889,247.10

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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.