Home / 387,623.87-581,435.81-121,405.22

Finding the Fourth Proportional to 387,623.87, 581,435.81 and 121,405.22

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Solution

The fourth proportional to 387,623.87, 581,435.81 and 121,405.22 is: 182,107.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,623.87 : 581,435.81 = 121,405.22 : x
  2. Step 2: Convert to fraction form
    387,623.87/581,435.81 = 121,405.22/x
  3. Step 3: Cross multiply
    387,623.87x = 581,435.81 × 121,405.22
  4. Step 4: Simplify right side
    387,623.87x = 70,589,338,914.72
  5. Step 5: Solve for x
    x = 70,589,338,914.72/387,623.87
  6. Step 6: Final answer
    x = 182,107.82

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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.