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Finding the Fourth Proportional to 84,483.60, 126,725.40 and 83,171.40

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Solution

The fourth proportional to 84,483.60, 126,725.40 and 83,171.40 is: 124,757.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,483.60 : 126,725.40 = 83,171.40 : x
  2. Step 2: Convert to fraction form
    84,483.60/126,725.40 = 83,171.40/x
  3. Step 3: Cross multiply
    84,483.60x = 126,725.40 × 83,171.40
  4. Step 4: Simplify right side
    84,483.60x = 10,539,928,933.56
  5. Step 5: Solve for x
    x = 10,539,928,933.56/84,483.60
  6. Step 6: Final answer
    x = 124,757.10

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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.