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Finding the Fourth Proportional to 329,691,790.80, 494,537,686.20 and 99,630,981.90

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Solution

The fourth proportional to 329,691,790.80, 494,537,686.20 and 99,630,981.90 is: 149,446,472.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,691,790.80 : 494,537,686.20 = 99,630,981.90 : x
  2. Step 2: Convert to fraction form
    329,691,790.80/494,537,686.20 = 99,630,981.90/x
  3. Step 3: Cross multiply
    329,691,790.80x = 494,537,686.20 × 99,630,981.90
  4. Step 4: Simplify right side
    329,691,790.80x = 49,271,275,262,660,080
  5. Step 5: Solve for x
    x = 49,271,275,262,660,080/329,691,790.80
  6. Step 6: Final answer
    x = 149,446,472.85

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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.