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Finding the Fourth Proportional to 82,313.40, 123,470.10 and 79,087.80

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Solution

The fourth proportional to 82,313.40, 123,470.10 and 79,087.80 is: 118,631.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,313.40 : 123,470.10 = 79,087.80 : x
  2. Step 2: Convert to fraction form
    82,313.40/123,470.10 = 79,087.80/x
  3. Step 3: Cross multiply
    82,313.40x = 123,470.10 × 79,087.80
  4. Step 4: Simplify right side
    82,313.40x = 9,764,978,574.78
  5. Step 5: Solve for x
    x = 9,764,978,574.78/82,313.40
  6. Step 6: Final answer
    x = 118,631.70

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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.