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Finding the Fourth Proportional to 129,667, 178,940.48 and 70,051

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Solution

The fourth proportional to 129,667, 178,940.48 and 70,051 is: 96,670.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,667 : 178,940.48 = 70,051 : x
  2. Step 2: Convert to fraction form
    129,667/178,940.48 = 70,051/x
  3. Step 3: Cross multiply
    129,667x = 178,940.48 × 70,051
  4. Step 4: Simplify right side
    129,667x = 12,534,959,564.48
  5. Step 5: Solve for x
    x = 12,534,959,564.48/129,667
  6. Step 6: Final answer
    x = 96,670.39

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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.