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Finding the Fourth Proportional to 85,720.84, 128,601.78 and 35,773.14

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Solution

The fourth proportional to 85,720.84, 128,601.78 and 35,773.14 is: 53,668.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,720.84 : 128,601.78 = 35,773.14 : x
  2. Step 2: Convert to fraction form
    85,720.84/128,601.78 = 35,773.14/x
  3. Step 3: Cross multiply
    85,720.84x = 128,601.78 × 35,773.14
  4. Step 4: Simplify right side
    85,720.84x = 4,600,489,480.19
  5. Step 5: Solve for x
    x = 4,600,489,480.19/85,720.84
  6. Step 6: Final answer
    x = 53,668.27

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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.