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Finding the Fourth Proportional to 88,720.60, 133,080.90 and 82,845.40

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Solution

The fourth proportional to 88,720.60, 133,080.90 and 82,845.40 is: 124,268.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,720.60 : 133,080.90 = 82,845.40 : x
  2. Step 2: Convert to fraction form
    88,720.60/133,080.90 = 82,845.40/x
  3. Step 3: Cross multiply
    88,720.60x = 133,080.90 × 82,845.40
  4. Step 4: Simplify right side
    88,720.60x = 11,025,140,392.86
  5. Step 5: Solve for x
    x = 11,025,140,392.86/88,720.60
  6. Step 6: Final answer
    x = 124,268.10

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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.