Home / 129,715.36-179,004.81-73,126.78

Finding the Fourth Proportional to 129,715.36, 179,004.81 and 73,126.78

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Solution

The fourth proportional to 129,715.36, 179,004.81 and 73,126.78 is: 100,913.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,715.36 : 179,004.81 = 73,126.78 : x
  2. Step 2: Convert to fraction form
    129,715.36/179,004.81 = 73,126.78/x
  3. Step 3: Cross multiply
    129,715.36x = 179,004.81 × 73,126.78
  4. Step 4: Simplify right side
    129,715.36x = 13,090,045,359.81
  5. Step 5: Solve for x
    x = 13,090,045,359.81/129,715.36
  6. Step 6: Final answer
    x = 100,913.61

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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.