Home / 387,620.86-581,431.30-121,402.21

Finding the Fourth Proportional to 387,620.86, 581,431.30 and 121,402.21

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Solution

The fourth proportional to 387,620.86, 581,431.30 and 121,402.21 is: 182,103.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,620.86 : 581,431.30 = 121,402.21 : x
  2. Step 2: Convert to fraction form
    387,620.86/581,431.30 = 121,402.21/x
  3. Step 3: Cross multiply
    387,620.86x = 581,431.30 × 121,402.21
  4. Step 4: Simplify right side
    387,620.86x = 70,587,045,206.46
  5. Step 5: Solve for x
    x = 70,587,045,206.46/387,620.86
  6. Step 6: Final answer
    x = 182,103.32

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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.