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Finding the Fourth Proportional to 86,237.76, 129,321.60 and 27,055.20

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Solution

The fourth proportional to 86,237.76, 129,321.60 and 27,055.20 is: 40,571.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,237.76 : 129,321.60 = 27,055.20 : x
  2. Step 2: Convert to fraction form
    86,237.76/129,321.60 = 27,055.20/x
  3. Step 3: Cross multiply
    86,237.76x = 129,321.60 × 27,055.20
  4. Step 4: Simplify right side
    86,237.76x = 3,498,821,752.32
  5. Step 5: Solve for x
    x = 3,498,821,752.32/86,237.76
  6. Step 6: Final answer
    x = 40,571.81

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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.