Home / 129,532.40-178,751.22-72,942.56

Finding the Fourth Proportional to 129,532.40, 178,751.22 and 72,942.56

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Solution

The fourth proportional to 129,532.40, 178,751.22 and 72,942.56 is: 100,658.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,532.40 : 178,751.22 = 72,942.56 : x
  2. Step 2: Convert to fraction form
    129,532.40/178,751.22 = 72,942.56/x
  3. Step 3: Cross multiply
    129,532.40x = 178,751.22 × 72,942.56
  4. Step 4: Simplify right side
    129,532.40x = 13,038,571,589.92
  5. Step 5: Solve for x
    x = 13,038,571,589.92/129,532.40
  6. Step 6: Final answer
    x = 100,658.77

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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.