Home / 66,781.76-100,013.62-38,642.51

Finding the Fourth Proportional to 66,781.76, 100,013.62 and 38,642.51

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Solution

The fourth proportional to 66,781.76, 100,013.62 and 38,642.51 is: 57,871.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,781.76 : 100,013.62 = 38,642.51 : x
  2. Step 2: Convert to fraction form
    66,781.76/100,013.62 = 38,642.51/x
  3. Step 3: Cross multiply
    66,781.76x = 100,013.62 × 38,642.51
  4. Step 4: Simplify right side
    66,781.76x = 3,864,777,464.41
  5. Step 5: Solve for x
    x = 3,864,777,464.41/66,781.76
  6. Step 6: Final answer
    x = 57,871.76

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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.