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Finding the Fourth Proportional to 72,660.60, 109,007.10 and 56,914.20

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Solution

The fourth proportional to 72,660.60, 109,007.10 and 56,914.20 is: 85,383.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,660.60 : 109,007.10 = 56,914.20 : x
  2. Step 2: Convert to fraction form
    72,660.60/109,007.10 = 56,914.20/x
  3. Step 3: Cross multiply
    72,660.60x = 109,007.10 × 56,914.20
  4. Step 4: Simplify right side
    72,660.60x = 6,204,051,890.82
  5. Step 5: Solve for x
    x = 6,204,051,890.82/72,660.60
  6. Step 6: Final answer
    x = 85,383.99

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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.