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Finding the Fourth Proportional to 143,571.98, 198,127.35 and 79,909.80

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Solution

The fourth proportional to 143,571.98, 198,127.35 and 79,909.80 is: 110,274.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,571.98 : 198,127.35 = 79,909.80 : x
  2. Step 2: Convert to fraction form
    143,571.98/198,127.35 = 79,909.80/x
  3. Step 3: Cross multiply
    143,571.98x = 198,127.35 × 79,909.80
  4. Step 4: Simplify right side
    143,571.98x = 15,832,316,913.03
  5. Step 5: Solve for x
    x = 15,832,316,913.03/143,571.98
  6. Step 6: Final answer
    x = 110,274.42

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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.