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Finding the Fourth Proportional to 101,887.02, 152,631.72 and 66,720.06

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Solution

The fourth proportional to 101,887.02, 152,631.72 and 66,720.06 is: 99,949.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,887.02 : 152,631.72 = 66,720.06 : x
  2. Step 2: Convert to fraction form
    101,887.02/152,631.72 = 66,720.06/x
  3. Step 3: Cross multiply
    101,887.02x = 152,631.72 × 66,720.06
  4. Step 4: Simplify right side
    101,887.02x = 10,183,597,516.30
  5. Step 5: Solve for x
    x = 10,183,597,516.30/101,887.02
  6. Step 6: Final answer
    x = 99,949.90

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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.