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Finding the Fourth Proportional to 81,858.75, 122,808.56 and 28,551.49

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Solution

The fourth proportional to 81,858.75, 122,808.56 and 28,551.49 is: 42,834.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,858.75 : 122,808.56 = 28,551.49 : x
  2. Step 2: Convert to fraction form
    81,858.75/122,808.56 = 28,551.49/x
  3. Step 3: Cross multiply
    81,858.75x = 122,808.56 × 28,551.49
  4. Step 4: Simplify right side
    81,858.75x = 3,506,367,734.23
  5. Step 5: Solve for x
    x = 3,506,367,734.23/81,858.75
  6. Step 6: Final answer
    x = 42,834.37

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1.5x scale

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.