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Finding the Fourth Proportional to 238,659.78, 357,978.32 and 70,173.30

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Solution

The fourth proportional to 238,659.78, 357,978.32 and 70,173.30 is: 105,256.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,659.78 : 357,978.32 = 70,173.30 : x
  2. Step 2: Convert to fraction form
    238,659.78/357,978.32 = 70,173.30/x
  3. Step 3: Cross multiply
    238,659.78x = 357,978.32 × 70,173.30
  4. Step 4: Simplify right side
    238,659.78x = 25,120,520,042.86
  5. Step 5: Solve for x
    x = 25,120,520,042.86/238,659.78
  6. Step 6: Final answer
    x = 105,256.61

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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.