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Finding the Fourth Proportional to 91,101.60, 125,720.34 and 50,817.96

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Solution

The fourth proportional to 91,101.60, 125,720.34 and 50,817.96 is: 70,128.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,101.60 : 125,720.34 = 50,817.96 : x
  2. Step 2: Convert to fraction form
    91,101.60/125,720.34 = 50,817.96/x
  3. Step 3: Cross multiply
    91,101.60x = 125,720.34 × 50,817.96
  4. Step 4: Simplify right side
    91,101.60x = 6,388,851,209.31
  5. Step 5: Solve for x
    x = 6,388,851,209.31/91,101.60
  6. Step 6: Final answer
    x = 70,128.86

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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.