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Finding the Fourth Proportional to 143,877.60, 215,816.40 and 80,632.80

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Solution

The fourth proportional to 143,877.60, 215,816.40 and 80,632.80 is: 120,949.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,877.60 : 215,816.40 = 80,632.80 : x
  2. Step 2: Convert to fraction form
    143,877.60/215,816.40 = 80,632.80/x
  3. Step 3: Cross multiply
    143,877.60x = 215,816.40 × 80,632.80
  4. Step 4: Simplify right side
    143,877.60x = 17,401,880,617.92
  5. Step 5: Solve for x
    x = 17,401,880,617.92/143,877.60
  6. Step 6: Final answer
    x = 120,949.20

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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.