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Finding the Fourth Proportional to 86,999.63, 120,057.44 and 51,191.96

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Solution

The fourth proportional to 86,999.63, 120,057.44 and 51,191.96 is: 70,643.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,999.63 : 120,057.44 = 51,191.96 : x
  2. Step 2: Convert to fraction form
    86,999.63/120,057.44 = 51,191.96/x
  3. Step 3: Cross multiply
    86,999.63x = 120,057.44 × 51,191.96
  4. Step 4: Simplify right side
    86,999.63x = 6,145,974,809.94
  5. Step 5: Solve for x
    x = 6,145,974,809.94/86,999.63
  6. Step 6: Final answer
    x = 70,643.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.