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Finding the Fourth Proportional to 86,708.80, 129,991.20 and 36,827.20

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Solution

The fourth proportional to 86,708.80, 129,991.20 and 36,827.20 is: 55,210.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,708.80 : 129,991.20 = 36,827.20 : x
  2. Step 2: Convert to fraction form
    86,708.80/129,991.20 = 36,827.20/x
  3. Step 3: Cross multiply
    86,708.80x = 129,991.20 × 36,827.20
  4. Step 4: Simplify right side
    86,708.80x = 4,787,211,920.64
  5. Step 5: Solve for x
    x = 4,787,211,920.64/86,708.80
  6. Step 6: Final answer
    x = 55,210.22

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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.