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Finding the Fourth Proportional to 387,843.85, 581,765.64 and 121,624.80

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Solution

The fourth proportional to 387,843.85, 581,765.64 and 121,624.80 is: 182,437.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,843.85 : 581,765.64 = 121,624.80 : x
  2. Step 2: Convert to fraction form
    387,843.85/581,765.64 = 121,624.80/x
  3. Step 3: Cross multiply
    387,843.85x = 581,765.64 × 121,624.80
  4. Step 4: Simplify right side
    387,843.85x = 70,757,129,611.87
  5. Step 5: Solve for x
    x = 70,757,129,611.87/387,843.85
  6. Step 6: Final answer
    x = 182,437.16

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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.