Home / 81,715.14-112,771.71-61,536.42

Finding the Fourth Proportional to 81,715.14, 112,771.71 and 61,536.42

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Solution

The fourth proportional to 81,715.14, 112,771.71 and 61,536.42 is: 84,923.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,715.14 : 112,771.71 = 61,536.42 : x
  2. Step 2: Convert to fraction form
    81,715.14/112,771.71 = 61,536.42/x
  3. Step 3: Cross multiply
    81,715.14x = 112,771.71 × 61,536.42
  4. Step 4: Simplify right side
    81,715.14x = 6,939,567,310.68
  5. Step 5: Solve for x
    x = 6,939,567,310.68/81,715.14
  6. Step 6: Final answer
    x = 84,923.89

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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.