Home / 285,382.09-428,077.32-135,637.66

Finding the Fourth Proportional to 285,382.09, 428,077.32 and 135,637.66

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Solution

The fourth proportional to 285,382.09, 428,077.32 and 135,637.66 is: 203,458.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,382.09 : 428,077.32 = 135,637.66 : x
  2. Step 2: Convert to fraction form
    285,382.09/428,077.32 = 135,637.66/x
  3. Step 3: Cross multiply
    285,382.09x = 428,077.32 × 135,637.66
  4. Step 4: Simplify right side
    285,382.09x = 58,063,403,165.30
  5. Step 5: Solve for x
    x = 58,063,403,165.30/285,382.09
  6. Step 6: Final answer
    x = 203,458.47

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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.