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Finding the Fourth Proportional to 264,961,409.88, 397,612,174.74 and 128,572,391.64

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Solution

The fourth proportional to 264,961,409.88, 397,612,174.74 and 128,572,391.64 is: 192,941,108.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,961,409.88 : 397,612,174.74 = 128,572,391.64 : x
  2. Step 2: Convert to fraction form
    264,961,409.88/397,612,174.74 = 128,572,391.64/x
  3. Step 3: Cross multiply
    264,961,409.88x = 397,612,174.74 × 128,572,391.64
  4. Step 4: Simplify right side
    264,961,409.88x = 51,121,948,251,503,400
  5. Step 5: Solve for x
    x = 51,121,948,251,503,400/264,961,409.88
  6. Step 6: Final answer
    x = 192,941,108.95

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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.