Home / 138,784.51-191,522.73-75,122.11

Finding the Fourth Proportional to 138,784.51, 191,522.73 and 75,122.11

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Solution

The fourth proportional to 138,784.51, 191,522.73 and 75,122.11 is: 103,668.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,784.51 : 191,522.73 = 75,122.11 : x
  2. Step 2: Convert to fraction form
    138,784.51/191,522.73 = 75,122.11/x
  3. Step 3: Cross multiply
    138,784.51x = 191,522.73 × 75,122.11
  4. Step 4: Simplify right side
    138,784.51x = 14,387,591,590.56
  5. Step 5: Solve for x
    x = 14,387,591,590.56/138,784.51
  6. Step 6: Final answer
    x = 103,668.57

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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.