Home / 129,133.74-178,195.94-71,769.34

Finding the Fourth Proportional to 129,133.74, 178,195.94 and 71,769.34

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Solution

The fourth proportional to 129,133.74, 178,195.94 and 71,769.34 is: 99,036.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,133.74 : 178,195.94 = 71,769.34 : x
  2. Step 2: Convert to fraction form
    129,133.74/178,195.94 = 71,769.34/x
  3. Step 3: Cross multiply
    129,133.74x = 178,195.94 × 71,769.34
  4. Step 4: Simplify right side
    129,133.74x = 12,789,005,004.48
  5. Step 5: Solve for x
    x = 12,789,005,004.48/129,133.74
  6. Step 6: Final answer
    x = 99,036.90

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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.