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Finding the Fourth Proportional to 86,906.70, 130,362.48 and 30,738.87

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Solution

The fourth proportional to 86,906.70, 130,362.48 and 30,738.87 is: 46,109.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,906.70 : 130,362.48 = 30,738.87 : x
  2. Step 2: Convert to fraction form
    86,906.70/130,362.48 = 30,738.87/x
  3. Step 3: Cross multiply
    86,906.70x = 130,362.48 × 30,738.87
  4. Step 4: Simplify right side
    86,906.70x = 4,007,195,325.60
  5. Step 5: Solve for x
    x = 4,007,195,325.60/86,906.70
  6. Step 6: Final answer
    x = 46,109.16

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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.