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Finding the Fourth Proportional to 327,888,911.30, 491,833,366.95 and 85,551,815.30

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Solution

The fourth proportional to 327,888,911.30, 491,833,366.95 and 85,551,815.30 is: 128,327,722.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,888,911.30 : 491,833,366.95 = 85,551,815.30 : x
  2. Step 2: Convert to fraction form
    327,888,911.30/491,833,366.95 = 85,551,815.30/x
  3. Step 3: Cross multiply
    327,888,911.30x = 491,833,366.95 × 85,551,815.30
  4. Step 4: Simplify right side
    327,888,911.30x = 42,077,237,367,683,520
  5. Step 5: Solve for x
    x = 42,077,237,367,683,520/327,888,911.30
  6. Step 6: Final answer
    x = 128,327,722.95

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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.