Home / 82,661.20-123,991.80-53,136.70

Finding the Fourth Proportional to 82,661.20, 123,991.80 and 53,136.70

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Solution

The fourth proportional to 82,661.20, 123,991.80 and 53,136.70 is: 79,705.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,661.20 : 123,991.80 = 53,136.70 : x
  2. Step 2: Convert to fraction form
    82,661.20/123,991.80 = 53,136.70/x
  3. Step 3: Cross multiply
    82,661.20x = 123,991.80 × 53,136.70
  4. Step 4: Simplify right side
    82,661.20x = 6,588,515,079.06
  5. Step 5: Solve for x
    x = 6,588,515,079.06/82,661.20
  6. Step 6: Final answer
    x = 79,705.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.