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Finding the Fourth Proportional to 84,590.42, 116,888.74 and 80,491.01

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Solution

The fourth proportional to 84,590.42, 116,888.74 and 80,491.01 is: 111,224.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,590.42 : 116,888.74 = 80,491.01 : x
  2. Step 2: Convert to fraction form
    84,590.42/116,888.74 = 80,491.01/x
  3. Step 3: Cross multiply
    84,590.42x = 116,888.74 × 80,491.01
  4. Step 4: Simplify right side
    84,590.42x = 9,408,491,954.56
  5. Step 5: Solve for x
    x = 9,408,491,954.56/84,590.42
  6. Step 6: Final answer
    x = 111,224.09

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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.