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Finding the Fourth Proportional to 80,876,629.30, 121,314,943.95 and 80,876,629.30

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Solution

The fourth proportional to 80,876,629.30, 121,314,943.95 and 80,876,629.30 is: 121,314,943.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,876,629.30 : 121,314,943.95 = 80,876,629.30 : x
  2. Step 2: Convert to fraction form
    80,876,629.30/121,314,943.95 = 80,876,629.30/x
  3. Step 3: Cross multiply
    80,876,629.30x = 121,314,943.95 × 80,876,629.30
  4. Step 4: Simplify right side
    80,876,629.30x = 9,811,543,750,394,428
  5. Step 5: Solve for x
    x = 9,811,543,750,394,428/80,876,629.30
  6. Step 6: Final answer
    x = 121,314,943.95

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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.