Home / 128,909.28-193,433.04-55,020

Finding the Fourth Proportional to 128,909.28, 193,433.04 and 55,020

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Solution

The fourth proportional to 128,909.28, 193,433.04 and 55,020 is: 82,559.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,909.28 : 193,433.04 = 55,020 : x
  2. Step 2: Convert to fraction form
    128,909.28/193,433.04 = 55,020/x
  3. Step 3: Cross multiply
    128,909.28x = 193,433.04 × 55,020
  4. Step 4: Simplify right side
    128,909.28x = 10,642,685,860.80
  5. Step 5: Solve for x
    x = 10,642,685,860.80/128,909.28
  6. Step 6: Final answer
    x = 82,559.50

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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.