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Finding the Fourth Proportional to 72,165.90, 108,358.20 and 55,544.70

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Solution

The fourth proportional to 72,165.90, 108,358.20 and 55,544.70 is: 83,401.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,165.90 : 108,358.20 = 55,544.70 : x
  2. Step 2: Convert to fraction form
    72,165.90/108,358.20 = 55,544.70/x
  3. Step 3: Cross multiply
    72,165.90x = 108,358.20 × 55,544.70
  4. Step 4: Simplify right side
    72,165.90x = 6,018,723,711.54
  5. Step 5: Solve for x
    x = 6,018,723,711.54/72,165.90
  6. Step 6: Final answer
    x = 83,401.21

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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.