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Finding the Fourth Proportional to 86,063.60, 129,056.52 and 30,661.04

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Solution

The fourth proportional to 86,063.60, 129,056.52 and 30,661.04 is: 45,977.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,063.60 : 129,056.52 = 30,661.04 : x
  2. Step 2: Convert to fraction form
    86,063.60/129,056.52 = 30,661.04/x
  3. Step 3: Cross multiply
    86,063.60x = 129,056.52 × 30,661.04
  4. Step 4: Simplify right side
    86,063.60x = 3,957,007,121.98
  5. Step 5: Solve for x
    x = 3,957,007,121.98/86,063.60
  6. Step 6: Final answer
    x = 45,977.71

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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.