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Finding the Fourth Proportional to 117,870, 176,734.32 and 79,965.84

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Solution

The fourth proportional to 117,870, 176,734.32 and 79,965.84 is: 119,900.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,870 : 176,734.32 = 79,965.84 : x
  2. Step 2: Convert to fraction form
    117,870/176,734.32 = 79,965.84/x
  3. Step 3: Cross multiply
    117,870x = 176,734.32 × 79,965.84
  4. Step 4: Simplify right side
    117,870x = 14,132,708,355.63
  5. Step 5: Solve for x
    x = 14,132,708,355.63/117,870
  6. Step 6: Final answer
    x = 119,900.81

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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.