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Finding the Fourth Proportional to 86,664.20, 130,015.20 and 49,242.20

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Solution

The fourth proportional to 86,664.20, 130,015.20 and 49,242.20 is: 73,874.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,664.20 : 130,015.20 = 49,242.20 : x
  2. Step 2: Convert to fraction form
    86,664.20/130,015.20 = 49,242.20/x
  3. Step 3: Cross multiply
    86,664.20x = 130,015.20 × 49,242.20
  4. Step 4: Simplify right side
    86,664.20x = 6,402,234,481.44
  5. Step 5: Solve for x
    x = 6,402,234,481.44/86,664.20
  6. Step 6: Final answer
    x = 73,874.04

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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.