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Finding the Fourth Proportional to 86,355.88, 129,538.44 and 27,196.16

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Solution

The fourth proportional to 86,355.88, 129,538.44 and 27,196.16 is: 40,795.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,355.88 : 129,538.44 = 27,196.16 : x
  2. Step 2: Convert to fraction form
    86,355.88/129,538.44 = 27,196.16/x
  3. Step 3: Cross multiply
    86,355.88x = 129,538.44 × 27,196.16
  4. Step 4: Simplify right side
    86,355.88x = 3,522,947,492.70
  5. Step 5: Solve for x
    x = 3,522,947,492.70/86,355.88
  6. Step 6: Final answer
    x = 40,795.69

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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.