Home / 129,089.37-178,144.04-72,500.75

Finding the Fourth Proportional to 129,089.37, 178,144.04 and 72,500.75

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Solution

The fourth proportional to 129,089.37, 178,144.04 and 72,500.75 is: 100,051.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,089.37 : 178,144.04 = 72,500.75 : x
  2. Step 2: Convert to fraction form
    129,089.37/178,144.04 = 72,500.75/x
  3. Step 3: Cross multiply
    129,089.37x = 178,144.04 × 72,500.75
  4. Step 4: Simplify right side
    129,089.37x = 12,915,576,508.03
  5. Step 5: Solve for x
    x = 12,915,576,508.03/129,089.37
  6. Step 6: Final answer
    x = 100,051.43

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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.