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Finding the Fourth Proportional to 192,786.60, 266,060.70 and 142,031.40

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Solution

The fourth proportional to 192,786.60, 266,060.70 and 142,031.40 is: 196,014.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,786.60 : 266,060.70 = 142,031.40 : x
  2. Step 2: Convert to fraction form
    192,786.60/266,060.70 = 142,031.40/x
  3. Step 3: Cross multiply
    192,786.60x = 266,060.70 × 142,031.40
  4. Step 4: Simplify right side
    192,786.60x = 37,788,973,705.98
  5. Step 5: Solve for x
    x = 37,788,973,705.98/192,786.60
  6. Step 6: Final answer
    x = 196,014.52

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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.