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Finding the Fourth Proportional to 69,829.80, 104,744.70 and 54,258.60

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Solution

The fourth proportional to 69,829.80, 104,744.70 and 54,258.60 is: 81,387.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,829.80 : 104,744.70 = 54,258.60 : x
  2. Step 2: Convert to fraction form
    69,829.80/104,744.70 = 54,258.60/x
  3. Step 3: Cross multiply
    69,829.80x = 104,744.70 × 54,258.60
  4. Step 4: Simplify right side
    69,829.80x = 5,683,300,779.42
  5. Step 5: Solve for x
    x = 5,683,300,779.42/69,829.80
  6. Step 6: Final answer
    x = 81,387.90

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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.