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Finding the Fourth Proportional to 316,138.55, 436,244.82 and 178,309.88

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Solution

The fourth proportional to 316,138.55, 436,244.82 and 178,309.88 is: 246,052.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,138.55 : 436,244.82 = 178,309.88 : x
  2. Step 2: Convert to fraction form
    316,138.55/436,244.82 = 178,309.88/x
  3. Step 3: Cross multiply
    316,138.55x = 436,244.82 × 178,309.88
  4. Step 4: Simplify right side
    316,138.55x = 77,786,761,628.18
  5. Step 5: Solve for x
    x = 77,786,761,628.18/316,138.55
  6. Step 6: Final answer
    x = 246,052.76

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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.