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Finding the Fourth Proportional to 108,945, 150,352.30 and 66,511.73

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Solution

The fourth proportional to 108,945, 150,352.30 and 66,511.73 is: 91,791.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,945 : 150,352.30 = 66,511.73 : x
  2. Step 2: Convert to fraction form
    108,945/150,352.30 = 66,511.73/x
  3. Step 3: Cross multiply
    108,945x = 150,352.30 × 66,511.73
  4. Step 4: Simplify right side
    108,945x = 10,000,192,041.50
  5. Step 5: Solve for x
    x = 10,000,192,041.50/108,945
  6. Step 6: Final answer
    x = 91,791.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.