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Finding the Fourth Proportional to 129,778, 179,093.68 and 70,162

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Solution

The fourth proportional to 129,778, 179,093.68 and 70,162 is: 96,823.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,778 : 179,093.68 = 70,162 : x
  2. Step 2: Convert to fraction form
    129,778/179,093.68 = 70,162/x
  3. Step 3: Cross multiply
    129,778x = 179,093.68 × 70,162
  4. Step 4: Simplify right side
    129,778x = 12,565,570,776.16
  5. Step 5: Solve for x
    x = 12,565,570,776.16/129,778
  6. Step 6: Final answer
    x = 96,823.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.