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Finding the Fourth Proportional to 172,415.80, 258,623.70 and 119,927.80

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Solution

The fourth proportional to 172,415.80, 258,623.70 and 119,927.80 is: 179,891.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,415.80 : 258,623.70 = 119,927.80 : x
  2. Step 2: Convert to fraction form
    172,415.80/258,623.70 = 119,927.80/x
  3. Step 3: Cross multiply
    172,415.80x = 258,623.70 × 119,927.80
  4. Step 4: Simplify right side
    172,415.80x = 31,016,171,368.86
  5. Step 5: Solve for x
    x = 31,016,171,368.86/172,415.80
  6. Step 6: Final answer
    x = 179,891.70

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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.