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Finding the Fourth Proportional to 86,492.51, 129,739.22 and 27,328.39

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Solution

The fourth proportional to 86,492.51, 129,739.22 and 27,328.39 is: 40,992.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,492.51 : 129,739.22 = 27,328.39 : x
  2. Step 2: Convert to fraction form
    86,492.51/129,739.22 = 27,328.39/x
  3. Step 3: Cross multiply
    86,492.51x = 129,739.22 × 27,328.39
  4. Step 4: Simplify right side
    86,492.51x = 3,545,563,643.95
  5. Step 5: Solve for x
    x = 3,545,563,643.95/86,492.51
  6. Step 6: Final answer
    x = 40,992.73

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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.