Home / 143,681.62-198,286.79-80,019.42

Finding the Fourth Proportional to 143,681.62, 198,286.79 and 80,019.42

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Solution

The fourth proportional to 143,681.62, 198,286.79 and 80,019.42 is: 110,430.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,681.62 : 198,286.79 = 80,019.42 : x
  2. Step 2: Convert to fraction form
    143,681.62/198,286.79 = 80,019.42/x
  3. Step 3: Cross multiply
    143,681.62x = 198,286.79 × 80,019.42
  4. Step 4: Simplify right side
    143,681.62x = 15,866,793,929.46
  5. Step 5: Solve for x
    x = 15,866,793,929.46/143,681.62
  6. Step 6: Final answer
    x = 110,430.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.