Home / 387,956.58-581,789.67-135,172.18

Finding the Fourth Proportional to 387,956.58, 581,789.67 and 135,172.18

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Solution

The fourth proportional to 387,956.58, 581,789.67 and 135,172.18 is: 202,707.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,956.58 : 581,789.67 = 135,172.18 : x
  2. Step 2: Convert to fraction form
    387,956.58/581,789.67 = 135,172.18/x
  3. Step 3: Cross multiply
    387,956.58x = 581,789.67 × 135,172.18
  4. Step 4: Simplify right side
    387,956.58x = 78,641,777,995.38
  5. Step 5: Solve for x
    x = 78,641,777,995.38/387,956.58
  6. Step 6: Final answer
    x = 202,707.68

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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.