Home / 103,789.20-155,683.94-28,909.56

Finding the Fourth Proportional to 103,789.20, 155,683.94 and 28,909.56

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Solution

The fourth proportional to 103,789.20, 155,683.94 and 28,909.56 is: 43,364.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,789.20 : 155,683.94 = 28,909.56 : x
  2. Step 2: Convert to fraction form
    103,789.20/155,683.94 = 28,909.56/x
  3. Step 3: Cross multiply
    103,789.20x = 155,683.94 × 28,909.56
  4. Step 4: Simplify right side
    103,789.20x = 4,500,754,204.47
  5. Step 5: Solve for x
    x = 4,500,754,204.47/103,789.20
  6. Step 6: Final answer
    x = 43,364.38

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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.