Home / 129,631.78-178,891.86-70,015.78

Finding the Fourth Proportional to 129,631.78, 178,891.86 and 70,015.78

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Solution

The fourth proportional to 129,631.78, 178,891.86 and 70,015.78 is: 96,621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,631.78 : 178,891.86 = 70,015.78 : x
  2. Step 2: Convert to fraction form
    129,631.78/178,891.86 = 70,015.78/x
  3. Step 3: Cross multiply
    129,631.78x = 178,891.86 × 70,015.78
  4. Step 4: Simplify right side
    129,631.78x = 12,525,253,113.55
  5. Step 5: Solve for x
    x = 12,525,253,113.55/129,631.78
  6. Step 6: Final answer
    x = 96,621.78

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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.