Home / 143,272.80-214,909.20-128,510.55

Finding the Fourth Proportional to 143,272.80, 214,909.20 and 128,510.55

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Solution

The fourth proportional to 143,272.80, 214,909.20 and 128,510.55 is: 192,765.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,272.80 : 214,909.20 = 128,510.55 : x
  2. Step 2: Convert to fraction form
    143,272.80/214,909.20 = 128,510.55/x
  3. Step 3: Cross multiply
    143,272.80x = 214,909.20 × 128,510.55
  4. Step 4: Simplify right side
    143,272.80x = 27,618,099,492.06
  5. Step 5: Solve for x
    x = 27,618,099,492.06/143,272.80
  6. Step 6: Final answer
    x = 192,765.83

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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.