Home / 81,678.62-112,708.09-45,868.34

Finding the Fourth Proportional to 81,678.62, 112,708.09 and 45,868.34

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Solution

The fourth proportional to 81,678.62, 112,708.09 and 45,868.34 is: 63,293.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,678.62 : 112,708.09 = 45,868.34 : x
  2. Step 2: Convert to fraction form
    81,678.62/112,708.09 = 45,868.34/x
  3. Step 3: Cross multiply
    81,678.62x = 112,708.09 × 45,868.34
  4. Step 4: Simplify right side
    81,678.62x = 5,169,732,992.87
  5. Step 5: Solve for x
    x = 5,169,732,992.87/81,678.62
  6. Step 6: Final answer
    x = 63,293.59

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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.