Home / 138,659.43-191,338.26-77,400.04

Finding the Fourth Proportional to 138,659.43, 191,338.26 and 77,400.04

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Solution

The fourth proportional to 138,659.43, 191,338.26 and 77,400.04 is: 106,805.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,659.43 : 191,338.26 = 77,400.04 : x
  2. Step 2: Convert to fraction form
    138,659.43/191,338.26 = 77,400.04/x
  3. Step 3: Cross multiply
    138,659.43x = 191,338.26 × 77,400.04
  4. Step 4: Simplify right side
    138,659.43x = 14,809,588,977.53
  5. Step 5: Solve for x
    x = 14,809,588,977.53/138,659.43
  6. Step 6: Final answer
    x = 106,805.49

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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.