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Finding the Fourth Proportional to 101,887.16, 152,631.92 and 66,720.20

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Solution

The fourth proportional to 101,887.16, 152,631.92 and 66,720.20 is: 99,950.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,887.16 : 152,631.92 = 66,720.20 : x
  2. Step 2: Convert to fraction form
    101,887.16/152,631.92 = 66,720.20/x
  3. Step 3: Cross multiply
    101,887.16x = 152,631.92 × 66,720.20
  4. Step 4: Simplify right side
    101,887.16x = 10,183,631,132.02
  5. Step 5: Solve for x
    x = 10,183,631,132.02/101,887.16
  6. Step 6: Final answer
    x = 99,950.10

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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.