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Finding the Fourth Proportional to 129,630, 178,889.52 and 70,014

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Solution

The fourth proportional to 129,630, 178,889.52 and 70,014 is: 96,619.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,630 : 178,889.52 = 70,014 : x
  2. Step 2: Convert to fraction form
    129,630/178,889.52 = 70,014/x
  3. Step 3: Cross multiply
    129,630x = 178,889.52 × 70,014
  4. Step 4: Simplify right side
    129,630x = 12,524,770,853.28
  5. Step 5: Solve for x
    x = 12,524,770,853.28/129,630
  6. Step 6: Final answer
    x = 96,619.38

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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.