Home / 143,280.80-214,921.20-128,518.55

Finding the Fourth Proportional to 143,280.80, 214,921.20 and 128,518.55

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Solution

The fourth proportional to 143,280.80, 214,921.20 and 128,518.55 is: 192,777.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,280.80 : 214,921.20 = 128,518.55 : x
  2. Step 2: Convert to fraction form
    143,280.80/214,921.20 = 128,518.55/x
  3. Step 3: Cross multiply
    143,280.80x = 214,921.20 × 128,518.55
  4. Step 4: Simplify right side
    143,280.80x = 27,621,360,988.26
  5. Step 5: Solve for x
    x = 27,621,360,988.26/143,280.80
  6. Step 6: Final answer
    x = 192,777.83

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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.