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Finding the Fourth Proportional to 129,940.78, 179,318.28 and 70,324.78

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Solution

The fourth proportional to 129,940.78, 179,318.28 and 70,324.78 is: 97,048.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,940.78 : 179,318.28 = 70,324.78 : x
  2. Step 2: Convert to fraction form
    129,940.78/179,318.28 = 70,324.78/x
  3. Step 3: Cross multiply
    129,940.78x = 179,318.28 × 70,324.78
  4. Step 4: Simplify right side
    129,940.78x = 12,610,518,590.98
  5. Step 5: Solve for x
    x = 12,610,518,590.98/129,940.78
  6. Step 6: Final answer
    x = 97,048.20

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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.