Home / 138,941.69-208,241.55-79,020.45

Finding the Fourth Proportional to 138,941.69, 208,241.55 and 79,020.45

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Solution

The fourth proportional to 138,941.69, 208,241.55 and 79,020.45 is: 118,433.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,941.69 : 208,241.55 = 79,020.45 : x
  2. Step 2: Convert to fraction form
    138,941.69/208,241.55 = 79,020.45/x
  3. Step 3: Cross multiply
    138,941.69x = 208,241.55 × 79,020.45
  4. Step 4: Simplify right side
    138,941.69x = 16,455,340,989.70
  5. Step 5: Solve for x
    x = 16,455,340,989.70/138,941.69
  6. Step 6: Final answer
    x = 118,433.43

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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.