Home / 99,399.11-149,128.06-57,309.39

Finding the Fourth Proportional to 99,399.11, 149,128.06 and 57,309.39

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Solution

The fourth proportional to 99,399.11, 149,128.06 and 57,309.39 is: 85,981.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,399.11 : 149,128.06 = 57,309.39 : x
  2. Step 2: Convert to fraction form
    99,399.11/149,128.06 = 57,309.39/x
  3. Step 3: Cross multiply
    99,399.11x = 149,128.06 × 57,309.39
  4. Step 4: Simplify right side
    99,399.11x = 8,546,438,007.21
  5. Step 5: Solve for x
    x = 8,546,438,007.21/99,399.11
  6. Step 6: Final answer
    x = 85,981.03

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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.