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Finding the Fourth Proportional to 68,054.40, 102,081.60 and 21,301.20

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Solution

The fourth proportional to 68,054.40, 102,081.60 and 21,301.20 is: 31,951.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,054.40 : 102,081.60 = 21,301.20 : x
  2. Step 2: Convert to fraction form
    68,054.40/102,081.60 = 21,301.20/x
  3. Step 3: Cross multiply
    68,054.40x = 102,081.60 × 21,301.20
  4. Step 4: Simplify right side
    68,054.40x = 2,174,460,577.92
  5. Step 5: Solve for x
    x = 2,174,460,577.92/68,054.40
  6. Step 6: Final answer
    x = 31,951.80

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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.