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Finding the Fourth Proportional to 117,777.80, 162,518.58 and 79,620.35

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Solution

The fourth proportional to 117,777.80, 162,518.58 and 79,620.35 is: 109,866.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,777.80 : 162,518.58 = 79,620.35 : x
  2. Step 2: Convert to fraction form
    117,777.80/162,518.58 = 79,620.35/x
  3. Step 3: Cross multiply
    117,777.80x = 162,518.58 × 79,620.35
  4. Step 4: Simplify right side
    117,777.80x = 12,939,786,221.10
  5. Step 5: Solve for x
    x = 12,939,786,221.10/117,777.80
  6. Step 6: Final answer
    x = 109,866.09

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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.