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Finding the Fourth Proportional to 86,505.34, 129,718.97 and 36,559.73

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Solution

The fourth proportional to 86,505.34, 129,718.97 and 36,559.73 is: 54,823.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,505.34 : 129,718.97 = 36,559.73 : x
  2. Step 2: Convert to fraction form
    86,505.34/129,718.97 = 36,559.73/x
  3. Step 3: Cross multiply
    86,505.34x = 129,718.97 × 36,559.73
  4. Step 4: Simplify right side
    86,505.34x = 4,742,489,961.88
  5. Step 5: Solve for x
    x = 4,742,489,961.88/86,505.34
  6. Step 6: Final answer
    x = 54,823.09

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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.