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Finding the Fourth Proportional to 74,135.70, 111,203.55 and 71,511.30

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Solution

The fourth proportional to 74,135.70, 111,203.55 and 71,511.30 is: 107,266.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,135.70 : 111,203.55 = 71,511.30 : x
  2. Step 2: Convert to fraction form
    74,135.70/111,203.55 = 71,511.30/x
  3. Step 3: Cross multiply
    74,135.70x = 111,203.55 × 71,511.30
  4. Step 4: Simplify right side
    74,135.70x = 7,952,310,425.12
  5. Step 5: Solve for x
    x = 7,952,310,425.12/74,135.70
  6. Step 6: Final answer
    x = 107,266.95

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1.5x scale

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.