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Finding the Fourth Proportional to 118,021.52, 162,929.94 and 79,982

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Solution

The fourth proportional to 118,021.52, 162,929.94 and 79,982 is: 110,415.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,021.52 : 162,929.94 = 79,982 : x
  2. Step 2: Convert to fraction form
    118,021.52/162,929.94 = 79,982/x
  3. Step 3: Cross multiply
    118,021.52x = 162,929.94 × 79,982
  4. Step 4: Simplify right side
    118,021.52x = 13,031,462,461.08
  5. Step 5: Solve for x
    x = 13,031,462,461.08/118,021.52
  6. Step 6: Final answer
    x = 110,415.99

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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.