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Finding the Fourth Proportional to 172,597.72, 258,896.58 and 54,279.40

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Solution

The fourth proportional to 172,597.72, 258,896.58 and 54,279.40 is: 81,419.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,597.72 : 258,896.58 = 54,279.40 : x
  2. Step 2: Convert to fraction form
    172,597.72/258,896.58 = 54,279.40/x
  3. Step 3: Cross multiply
    172,597.72x = 258,896.58 × 54,279.40
  4. Step 4: Simplify right side
    172,597.72x = 14,052,751,024.45
  5. Step 5: Solve for x
    x = 14,052,751,024.45/172,597.72
  6. Step 6: Final answer
    x = 81,419.10

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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.