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Finding the Fourth Proportional to 132,742.80, 183,135.60 and 87,447.60

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Solution

The fourth proportional to 132,742.80, 183,135.60 and 87,447.60 is: 120,645.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,742.80 : 183,135.60 = 87,447.60 : x
  2. Step 2: Convert to fraction form
    132,742.80/183,135.60 = 87,447.60/x
  3. Step 3: Cross multiply
    132,742.80x = 183,135.60 × 87,447.60
  4. Step 4: Simplify right side
    132,742.80x = 16,014,768,694.56
  5. Step 5: Solve for x
    x = 16,014,768,694.56/132,742.80
  6. Step 6: Final answer
    x = 120,645.10

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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.