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Finding the Fourth Proportional to 194,484.78, 268,388.60 and 105,060.78

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Solution

The fourth proportional to 194,484.78, 268,388.60 and 105,060.78 is: 144,983.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,484.78 : 268,388.60 = 105,060.78 : x
  2. Step 2: Convert to fraction form
    194,484.78/268,388.60 = 105,060.78/x
  3. Step 3: Cross multiply
    194,484.78x = 268,388.60 × 105,060.78
  4. Step 4: Simplify right side
    194,484.78x = 28,197,115,133.80
  5. Step 5: Solve for x
    x = 28,197,115,133.80/194,484.78
  6. Step 6: Final answer
    x = 144,983.66

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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.