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Finding the Fourth Proportional to 91,109.92, 136,670.64 and 38,512.48

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Solution

The fourth proportional to 91,109.92, 136,670.64 and 38,512.48 is: 57,771.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,109.92 : 136,670.64 = 38,512.48 : x
  2. Step 2: Convert to fraction form
    91,109.92/136,670.64 = 38,512.48/x
  3. Step 3: Cross multiply
    91,109.92x = 136,670.64 × 38,512.48
  4. Step 4: Simplify right side
    91,109.92x = 5,263,525,289.59
  5. Step 5: Solve for x
    x = 5,263,525,289.59/91,109.92
  6. Step 6: Final answer
    x = 57,771.15

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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.