Home / 145,239.68-200,426.42-80,708.72

Finding the Fourth Proportional to 145,239.68, 200,426.42 and 80,708.72

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Solution

The fourth proportional to 145,239.68, 200,426.42 and 80,708.72 is: 111,375.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,239.68 : 200,426.42 = 80,708.72 : x
  2. Step 2: Convert to fraction form
    145,239.68/200,426.42 = 80,708.72/x
  3. Step 3: Cross multiply
    145,239.68x = 200,426.42 × 80,708.72
  4. Step 4: Simplify right side
    145,239.68x = 16,176,160,139.42
  5. Step 5: Solve for x
    x = 16,176,160,139.42/145,239.68
  6. Step 6: Final answer
    x = 111,375.62

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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.