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Finding the Fourth Proportional to 172,114.20, 257,951.39 and 138,849.93

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Solution

The fourth proportional to 172,114.20, 257,951.39 and 138,849.93 is: 208,097.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,114.20 : 257,951.39 = 138,849.93 : x
  2. Step 2: Convert to fraction form
    172,114.20/257,951.39 = 138,849.93/x
  3. Step 3: Cross multiply
    172,114.20x = 257,951.39 × 138,849.93
  4. Step 4: Simplify right side
    172,114.20x = 35,816,531,750.65
  5. Step 5: Solve for x
    x = 35,816,531,750.65/172,114.20
  6. Step 6: Final answer
    x = 208,097.48

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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.