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Finding the Fourth Proportional to 220,130.40, 330,157.20 and 79,816.80

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Solution

The fourth proportional to 220,130.40, 330,157.20 and 79,816.80 is: 119,711.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,130.40 : 330,157.20 = 79,816.80 : x
  2. Step 2: Convert to fraction form
    220,130.40/330,157.20 = 79,816.80/x
  3. Step 3: Cross multiply
    220,130.40x = 330,157.20 × 79,816.80
  4. Step 4: Simplify right side
    220,130.40x = 26,352,091,200.96
  5. Step 5: Solve for x
    x = 26,352,091,200.96/220,130.40
  6. Step 6: Final answer
    x = 119,711.28

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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.