Home / 387,738.64-581,608.16-121,519.89

Finding the Fourth Proportional to 387,738.64, 581,608.16 and 121,519.89

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Solution

The fourth proportional to 387,738.64, 581,608.16 and 121,519.89 is: 182,279.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,738.64 : 581,608.16 = 121,519.89 : x
  2. Step 2: Convert to fraction form
    387,738.64/581,608.16 = 121,519.89/x
  3. Step 3: Cross multiply
    387,738.64x = 581,608.16 × 121,519.89
  4. Step 4: Simplify right side
    387,738.64x = 70,676,959,930.10
  5. Step 5: Solve for x
    x = 70,676,959,930.10/387,738.64
  6. Step 6: Final answer
    x = 182,279.90

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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.