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Finding the Fourth Proportional to 317,993,782.95, 476,990,840.79 and 99,661,129.61

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Solution

The fourth proportional to 317,993,782.95, 476,990,840.79 and 99,661,129.61 is: 149,491,746.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,993,782.95 : 476,990,840.79 = 99,661,129.61 : x
  2. Step 2: Convert to fraction form
    317,993,782.95/476,990,840.79 = 99,661,129.61/x
  3. Step 3: Cross multiply
    317,993,782.95x = 476,990,840.79 × 99,661,129.61
  4. Step 4: Simplify right side
    317,993,782.95x = 47,537,446,004,370,112
  5. Step 5: Solve for x
    x = 47,537,446,004,370,112/317,993,782.95
  6. Step 6: Final answer
    x = 149,491,746.55

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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.