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Finding the Fourth Proportional to 82,238.80, 123,415.80 and 52,728.40

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Solution

The fourth proportional to 82,238.80, 123,415.80 and 52,728.40 is: 79,129.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,238.80 : 123,415.80 = 52,728.40 : x
  2. Step 2: Convert to fraction form
    82,238.80/123,415.80 = 52,728.40/x
  3. Step 3: Cross multiply
    82,238.80x = 123,415.80 × 52,728.40
  4. Step 4: Simplify right side
    82,238.80x = 6,507,517,668.72
  5. Step 5: Solve for x
    x = 6,507,517,668.72/82,238.80
  6. Step 6: Final answer
    x = 79,129.53

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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.