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Finding the Fourth Proportional to 65,961.81, 91,021.86 and 38,735.01

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Solution

The fourth proportional to 65,961.81, 91,021.86 and 38,735.01 is: 53,451.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,961.81 : 91,021.86 = 38,735.01 : x
  2. Step 2: Convert to fraction form
    65,961.81/91,021.86 = 38,735.01/x
  3. Step 3: Cross multiply
    65,961.81x = 91,021.86 × 38,735.01
  4. Step 4: Simplify right side
    65,961.81x = 3,525,732,657.32
  5. Step 5: Solve for x
    x = 3,525,732,657.32/65,961.81
  6. Step 6: Final answer
    x = 53,451.12

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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.