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Finding the Fourth Proportional to 99,980.56, 150,008.28 and 51,919.21

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Solution

The fourth proportional to 99,980.56, 150,008.28 and 51,919.21 is: 77,898.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,980.56 : 150,008.28 = 51,919.21 : x
  2. Step 2: Convert to fraction form
    99,980.56/150,008.28 = 51,919.21/x
  3. Step 3: Cross multiply
    99,980.56x = 150,008.28 × 51,919.21
  4. Step 4: Simplify right side
    99,980.56x = 7,788,311,391.06
  5. Step 5: Solve for x
    x = 7,788,311,391.06/99,980.56
  6. Step 6: Final answer
    x = 77,898.26

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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.