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Finding the Fourth Proportional to 72,416.85, 108,648.84 and 34,981.22

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Solution

The fourth proportional to 72,416.85, 108,648.84 and 34,981.22 is: 52,483.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,416.85 : 108,648.84 = 34,981.22 : x
  2. Step 2: Convert to fraction form
    72,416.85/108,648.84 = 34,981.22/x
  3. Step 3: Cross multiply
    72,416.85x = 108,648.84 × 34,981.22
  4. Step 4: Simplify right side
    72,416.85x = 3,800,668,766.44
  5. Step 5: Solve for x
    x = 3,800,668,766.44/72,416.85
  6. Step 6: Final answer
    x = 52,483.21

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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.