Home / 208,987.14-313,381.89-80,963.40

Finding the Fourth Proportional to 208,987.14, 313,381.89 and 80,963.40

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Solution

The fourth proportional to 208,987.14, 313,381.89 and 80,963.40 is: 121,406.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,987.14 : 313,381.89 = 80,963.40 : x
  2. Step 2: Convert to fraction form
    208,987.14/313,381.89 = 80,963.40/x
  3. Step 3: Cross multiply
    208,987.14x = 313,381.89 × 80,963.40
  4. Step 4: Simplify right side
    208,987.14x = 25,372,462,908.01
  5. Step 5: Solve for x
    x = 25,372,462,908.01/208,987.14
  6. Step 6: Final answer
    x = 121,406.81

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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.