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Finding the Fourth Proportional to 76,539.92, 114,821.78 and 39,079.68

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Solution

The fourth proportional to 76,539.92, 114,821.78 and 39,079.68 is: 58,625.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,539.92 : 114,821.78 = 39,079.68 : x
  2. Step 2: Convert to fraction form
    76,539.92/114,821.78 = 39,079.68/x
  3. Step 3: Cross multiply
    76,539.92x = 114,821.78 × 39,079.68
  4. Step 4: Simplify right side
    76,539.92x = 4,487,198,419.43
  5. Step 5: Solve for x
    x = 4,487,198,419.43/76,539.92
  6. Step 6: Final answer
    x = 58,625.60

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1.5x scale

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.