Home / 129,530.24-178,760.84-72,173.28

Finding the Fourth Proportional to 129,530.24, 178,760.84 and 72,173.28

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Solution

The fourth proportional to 129,530.24, 178,760.84 and 72,173.28 is: 99,604.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,530.24 : 178,760.84 = 72,173.28 : x
  2. Step 2: Convert to fraction form
    129,530.24/178,760.84 = 72,173.28/x
  3. Step 3: Cross multiply
    129,530.24x = 178,760.84 × 72,173.28
  4. Step 4: Simplify right side
    129,530.24x = 12,901,756,158.36
  5. Step 5: Solve for x
    x = 12,901,756,158.36/129,530.24
  6. Step 6: Final answer
    x = 99,604.20

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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.