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Finding the Fourth Proportional to 86,687.72, 119,627.64 and 48,447.80

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Solution

The fourth proportional to 86,687.72, 119,627.64 and 48,447.80 is: 66,857.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,687.72 : 119,627.64 = 48,447.80 : x
  2. Step 2: Convert to fraction form
    86,687.72/119,627.64 = 48,447.80/x
  3. Step 3: Cross multiply
    86,687.72x = 119,627.64 × 48,447.80
  4. Step 4: Simplify right side
    86,687.72x = 5,795,695,977.19
  5. Step 5: Solve for x
    x = 5,795,695,977.19/86,687.72
  6. Step 6: Final answer
    x = 66,857.17

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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.