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Finding the Fourth Proportional to 172,885.48, 259,430.94 and 74,389.48

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Solution

The fourth proportional to 172,885.48, 259,430.94 and 74,389.48 is: 111,628.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,885.48 : 259,430.94 = 74,389.48 : x
  2. Step 2: Convert to fraction form
    172,885.48/259,430.94 = 74,389.48/x
  3. Step 3: Cross multiply
    172,885.48x = 259,430.94 × 74,389.48
  4. Step 4: Simplify right side
    172,885.48x = 19,298,932,722.51
  5. Step 5: Solve for x
    x = 19,298,932,722.51/172,885.48
  6. Step 6: Final answer
    x = 111,628.42

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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.