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Finding the Fourth Proportional to 223,889.55, 308,730.80 and 172,910.58

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Solution

The fourth proportional to 223,889.55, 308,730.80 and 172,910.58 is: 238,433.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,889.55 : 308,730.80 = 172,910.58 : x
  2. Step 2: Convert to fraction form
    223,889.55/308,730.80 = 172,910.58/x
  3. Step 3: Cross multiply
    223,889.55x = 308,730.80 × 172,910.58
  4. Step 4: Simplify right side
    223,889.55x = 53,382,820,827.31
  5. Step 5: Solve for x
    x = 53,382,820,827.31/223,889.55
  6. Step 6: Final answer
    x = 238,433.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.