Home / 85,011.20-127,516.80-80,172.80

Finding the Fourth Proportional to 85,011.20, 127,516.80 and 80,172.80

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Solution

The fourth proportional to 85,011.20, 127,516.80 and 80,172.80 is: 120,259.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,011.20 : 127,516.80 = 80,172.80 : x
  2. Step 2: Convert to fraction form
    85,011.20/127,516.80 = 80,172.80/x
  3. Step 3: Cross multiply
    85,011.20x = 127,516.80 × 80,172.80
  4. Step 4: Simplify right side
    85,011.20x = 10,223,378,903.04
  5. Step 5: Solve for x
    x = 10,223,378,903.04/85,011.20
  6. Step 6: Final answer
    x = 120,259.20

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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.