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Finding the Fourth Proportional to 112,687.78, 168,786.03 and 56,429.77

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Solution

The fourth proportional to 112,687.78, 168,786.03 and 56,429.77 is: 84,521.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,687.78 : 168,786.03 = 56,429.77 : x
  2. Step 2: Convert to fraction form
    112,687.78/168,786.03 = 56,429.77/x
  3. Step 3: Cross multiply
    112,687.78x = 168,786.03 × 56,429.77
  4. Step 4: Simplify right side
    112,687.78x = 9,524,556,852.11
  5. Step 5: Solve for x
    x = 9,524,556,852.11/112,687.78
  6. Step 6: Final answer
    x = 84,521.65

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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.