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Finding the Fourth Proportional to 86,571.90, 129,875.40 and 49,149.90

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Solution

The fourth proportional to 86,571.90, 129,875.40 and 49,149.90 is: 73,734.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,571.90 : 129,875.40 = 49,149.90 : x
  2. Step 2: Convert to fraction form
    86,571.90/129,875.40 = 49,149.90/x
  3. Step 3: Cross multiply
    86,571.90x = 129,875.40 × 49,149.90
  4. Step 4: Simplify right side
    86,571.90x = 6,383,362,922.46
  5. Step 5: Solve for x
    x = 6,383,362,922.46/86,571.90
  6. Step 6: Final answer
    x = 73,734.81

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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.