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Finding the Fourth Proportional to 86,889.55, 119,845.74 and 79,742.53

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Solution

The fourth proportional to 86,889.55, 119,845.74 and 79,742.53 is: 109,987.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,889.55 : 119,845.74 = 79,742.53 : x
  2. Step 2: Convert to fraction form
    86,889.55/119,845.74 = 79,742.53/x
  3. Step 3: Cross multiply
    86,889.55x = 119,845.74 × 79,742.53
  4. Step 4: Simplify right side
    86,889.55x = 9,556,802,517.32
  5. Step 5: Solve for x
    x = 9,556,802,517.32/86,889.55
  6. Step 6: Final answer
    x = 109,987.94

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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.