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Finding the Fourth Proportional to 74,216.70, 111,325.05 and 66,699.90

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Solution

The fourth proportional to 74,216.70, 111,325.05 and 66,699.90 is: 100,049.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,216.70 : 111,325.05 = 66,699.90 : x
  2. Step 2: Convert to fraction form
    74,216.70/111,325.05 = 66,699.90/x
  3. Step 3: Cross multiply
    74,216.70x = 111,325.05 × 66,699.90
  4. Step 4: Simplify right side
    74,216.70x = 7,425,369,702.50
  5. Step 5: Solve for x
    x = 7,425,369,702.50/74,216.70
  6. Step 6: Final answer
    x = 100,049.85

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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.