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Finding the Fourth Proportional to 143,571.67, 198,130.80 and 79,048.42

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Solution

The fourth proportional to 143,571.67, 198,130.80 and 79,048.42 is: 109,087.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,571.67 : 198,130.80 = 79,048.42 : x
  2. Step 2: Convert to fraction form
    143,571.67/198,130.80 = 79,048.42/x
  3. Step 3: Cross multiply
    143,571.67x = 198,130.80 × 79,048.42
  4. Step 4: Simplify right side
    143,571.67x = 15,661,926,693.34
  5. Step 5: Solve for x
    x = 15,661,926,693.34/143,571.67
  6. Step 6: Final answer
    x = 109,087.86

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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.