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Finding the Fourth Proportional to 86,490.90, 129,712.05 and 27,344.70

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Solution

The fourth proportional to 86,490.90, 129,712.05 and 27,344.70 is: 41,009.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,490.90 : 129,712.05 = 27,344.70 : x
  2. Step 2: Convert to fraction form
    86,490.90/129,712.05 = 27,344.70/x
  3. Step 3: Cross multiply
    86,490.90x = 129,712.05 × 27,344.70
  4. Step 4: Simplify right side
    86,490.90x = 3,546,937,093.64
  5. Step 5: Solve for x
    x = 3,546,937,093.64/86,490.90
  6. Step 6: Final answer
    x = 41,009.37

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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.