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Finding the Fourth Proportional to 86,716.77, 130,073.33 and 39,969.64

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Solution

The fourth proportional to 86,716.77, 130,073.33 and 39,969.64 is: 59,953.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,716.77 : 130,073.33 = 39,969.64 : x
  2. Step 2: Convert to fraction form
    86,716.77/130,073.33 = 39,969.64/x
  3. Step 3: Cross multiply
    86,716.77x = 130,073.33 × 39,969.64
  4. Step 4: Simplify right side
    86,716.77x = 5,198,984,211.39
  5. Step 5: Solve for x
    x = 5,198,984,211.39/86,716.77
  6. Step 6: Final answer
    x = 59,953.62

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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.