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Finding the Fourth Proportional to 327,888,930.30, 491,833,395.45 and 85,551,834.30

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Solution

The fourth proportional to 327,888,930.30, 491,833,395.45 and 85,551,834.30 is: 128,327,751.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,888,930.30 : 491,833,395.45 = 85,551,834.30 : x
  2. Step 2: Convert to fraction form
    327,888,930.30/491,833,395.45 = 85,551,834.30/x
  3. Step 3: Cross multiply
    327,888,930.30x = 491,833,395.45 × 85,551,834.30
  4. Step 4: Simplify right side
    327,888,930.30x = 42,077,249,150,744,768
  5. Step 5: Solve for x
    x = 42,077,249,150,744,768/327,888,930.30
  6. Step 6: Final answer
    x = 128,327,751.45

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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.