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Finding the Fourth Proportional to 172,247.82, 258,314.24 and 72,389.40

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Solution

The fourth proportional to 172,247.82, 258,314.24 and 72,389.40 is: 108,559.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,247.82 : 258,314.24 = 72,389.40 : x
  2. Step 2: Convert to fraction form
    172,247.82/258,314.24 = 72,389.40/x
  3. Step 3: Cross multiply
    172,247.82x = 258,314.24 × 72,389.40
  4. Step 4: Simplify right side
    172,247.82x = 18,699,213,026.03
  5. Step 5: Solve for x
    x = 18,699,213,026.03/172,247.82
  6. Step 6: Final answer
    x = 108,559.94

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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.