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Finding the Fourth Proportional to 129,765, 179,086.64 and 73,187.31

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Solution

The fourth proportional to 129,765, 179,086.64 and 73,187.31 is: 101,004.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,765 : 179,086.64 = 73,187.31 : x
  2. Step 2: Convert to fraction form
    129,765/179,086.64 = 73,187.31/x
  3. Step 3: Cross multiply
    129,765x = 179,086.64 × 73,187.31
  4. Step 4: Simplify right side
    129,765x = 13,106,869,072.60
  5. Step 5: Solve for x
    x = 13,106,869,072.60/129,765
  6. Step 6: Final answer
    x = 101,004.66

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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.