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Finding the Fourth Proportional to 81,383.79, 122,031.10 and 25,208.31

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Solution

The fourth proportional to 81,383.79, 122,031.10 and 25,208.31 is: 37,798.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,383.79 : 122,031.10 = 25,208.31 : x
  2. Step 2: Convert to fraction form
    81,383.79/122,031.10 = 25,208.31/x
  3. Step 3: Cross multiply
    81,383.79x = 122,031.10 × 25,208.31
  4. Step 4: Simplify right side
    81,383.79x = 3,076,197,417.85
  5. Step 5: Solve for x
    x = 3,076,197,417.85/81,383.79
  6. Step 6: Final answer
    x = 37,798.65

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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.