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Finding the Fourth Proportional to 86,492.72, 129,738.31 and 27,328.40

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Solution

The fourth proportional to 86,492.72, 129,738.31 and 27,328.40 is: 40,992.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,492.72 : 129,738.31 = 27,328.40 : x
  2. Step 2: Convert to fraction form
    86,492.72/129,738.31 = 27,328.40/x
  3. Step 3: Cross multiply
    86,492.72x = 129,738.31 × 27,328.40
  4. Step 4: Simplify right side
    86,492.72x = 3,545,540,431.00
  5. Step 5: Solve for x
    x = 3,545,540,431.00/86,492.72
  6. Step 6: Final answer
    x = 40,992.36

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1.5x scale

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.