Home / 387,890.82-581,835.96-121,671.90

Finding the Fourth Proportional to 387,890.82, 581,835.96 and 121,671.90

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Solution

The fourth proportional to 387,890.82, 581,835.96 and 121,671.90 is: 182,507.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,890.82 : 581,835.96 = 121,671.90 : x
  2. Step 2: Convert to fraction form
    387,890.82/581,835.96 = 121,671.90/x
  3. Step 3: Cross multiply
    387,890.82x = 581,835.96 × 121,671.90
  4. Step 4: Simplify right side
    387,890.82x = 70,793,086,741.52
  5. Step 5: Solve for x
    x = 70,793,086,741.52/387,890.82
  6. Step 6: Final answer
    x = 182,507.77

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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.