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Finding the Fourth Proportional to 257,054.05, 385,659.89 and 115,018.88

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Solution

The fourth proportional to 257,054.05, 385,659.89 and 115,018.88 is: 172,563.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,054.05 : 385,659.89 = 115,018.88 : x
  2. Step 2: Convert to fraction form
    257,054.05/385,659.89 = 115,018.88/x
  3. Step 3: Cross multiply
    257,054.05x = 385,659.89 × 115,018.88
  4. Step 4: Simplify right side
    257,054.05x = 44,358,166,680.42
  5. Step 5: Solve for x
    x = 44,358,166,680.42/257,054.05
  6. Step 6: Final answer
    x = 172,563.58

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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.