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Finding the Fourth Proportional to 115,239.99, 172,845.41 and 45,168.51

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Solution

The fourth proportional to 115,239.99, 172,845.41 and 45,168.51 is: 67,747.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,239.99 : 172,845.41 = 45,168.51 : x
  2. Step 2: Convert to fraction form
    115,239.99/172,845.41 = 45,168.51/x
  3. Step 3: Cross multiply
    115,239.99x = 172,845.41 × 45,168.51
  4. Step 4: Simplify right side
    115,239.99x = 7,807,169,404.20
  5. Step 5: Solve for x
    x = 7,807,169,404.20/115,239.99
  6. Step 6: Final answer
    x = 67,747.05

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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.