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Finding the Fourth Proportional to 86,478.94, 129,768.42 and 36,555.79

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Solution

The fourth proportional to 86,478.94, 129,768.42 and 36,555.79 is: 54,854.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,478.94 : 129,768.42 = 36,555.79 : x
  2. Step 2: Convert to fraction form
    86,478.94/129,768.42 = 36,555.79/x
  3. Step 3: Cross multiply
    86,478.94x = 129,768.42 × 36,555.79
  4. Step 4: Simplify right side
    86,478.94x = 4,743,787,110.15
  5. Step 5: Solve for x
    x = 4,743,787,110.15/86,478.94
  6. Step 6: Final answer
    x = 54,854.82

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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.