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Finding the Fourth Proportional to 129,790.92, 179,109 and 73,202.28

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Solution

The fourth proportional to 129,790.92, 179,109 and 73,202.28 is: 101,017.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,790.92 : 179,109 = 73,202.28 : x
  2. Step 2: Convert to fraction form
    129,790.92/179,109 = 73,202.28/x
  3. Step 3: Cross multiply
    129,790.92x = 179,109 × 73,202.28
  4. Step 4: Simplify right side
    129,790.92x = 13,111,187,168.52
  5. Step 5: Solve for x
    x = 13,111,187,168.52/129,790.92
  6. Step 6: Final answer
    x = 101,017.75

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1.5x scale

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.