Home / 65,781.39-90,786.11-38,923.90

Finding the Fourth Proportional to 65,781.39, 90,786.11 and 38,923.90

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Solution

The fourth proportional to 65,781.39, 90,786.11 and 38,923.90 is: 53,719.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,781.39 : 90,786.11 = 38,923.90 : x
  2. Step 2: Convert to fraction form
    65,781.39/90,786.11 = 38,923.90/x
  3. Step 3: Cross multiply
    65,781.39x = 90,786.11 × 38,923.90
  4. Step 4: Simplify right side
    65,781.39x = 3,533,749,495.74
  5. Step 5: Solve for x
    x = 3,533,749,495.74/65,781.39
  6. Step 6: Final answer
    x = 53,719.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.