Home / 145,121.28-200,279.88-80,602.89

Finding the Fourth Proportional to 145,121.28, 200,279.88 and 80,602.89

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Solution

The fourth proportional to 145,121.28, 200,279.88 and 80,602.89 is: 111,238.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,121.28 : 200,279.88 = 80,602.89 : x
  2. Step 2: Convert to fraction form
    145,121.28/200,279.88 = 80,602.89/x
  3. Step 3: Cross multiply
    145,121.28x = 200,279.88 × 80,602.89
  4. Step 4: Simplify right side
    145,121.28x = 16,143,137,136.85
  5. Step 5: Solve for x
    x = 16,143,137,136.85/145,121.28
  6. Step 6: Final answer
    x = 111,238.94

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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.