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Finding the Fourth Proportional to 76,992, 115,492.38 and 21,592.32

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Solution

The fourth proportional to 76,992, 115,492.38 and 21,592.32 is: 32,389.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,992 : 115,492.38 = 21,592.32 : x
  2. Step 2: Convert to fraction form
    76,992/115,492.38 = 21,592.32/x
  3. Step 3: Cross multiply
    76,992x = 115,492.38 × 21,592.32
  4. Step 4: Simplify right side
    76,992x = 2,493,748,426.52
  5. Step 5: Solve for x
    x = 2,493,748,426.52/76,992
  6. Step 6: Final answer
    x = 32,389.71

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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.