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Finding the Fourth Proportional to 70,791.61, 106,236.60 and 45,769.60

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Solution

The fourth proportional to 70,791.61, 106,236.60 and 45,769.60 is: 68,686.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,791.61 : 106,236.60 = 45,769.60 : x
  2. Step 2: Convert to fraction form
    70,791.61/106,236.60 = 45,769.60/x
  3. Step 3: Cross multiply
    70,791.61x = 106,236.60 × 45,769.60
  4. Step 4: Simplify right side
    70,791.61x = 4,862,406,687.36
  5. Step 5: Solve for x
    x = 4,862,406,687.36/70,791.61
  6. Step 6: Final answer
    x = 68,686.20

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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.