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Finding the Fourth Proportional to 85,960.87, 128,967.69 and 41,039.53

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Solution

The fourth proportional to 85,960.87, 128,967.69 and 41,039.53 is: 61,571.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,960.87 : 128,967.69 = 41,039.53 : x
  2. Step 2: Convert to fraction form
    85,960.87/128,967.69 = 41,039.53/x
  3. Step 3: Cross multiply
    85,960.87x = 128,967.69 × 41,039.53
  4. Step 4: Simplify right side
    85,960.87x = 5,292,773,382.79
  5. Step 5: Solve for x
    x = 5,292,773,382.79/85,960.87
  6. Step 6: Final answer
    x = 61,571.89

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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.