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Finding the Fourth Proportional to 76,770.86, 115,156.30 and 29,990.94

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Solution

The fourth proportional to 76,770.86, 115,156.30 and 29,990.94 is: 44,986.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,770.86 : 115,156.30 = 29,990.94 : x
  2. Step 2: Convert to fraction form
    76,770.86/115,156.30 = 29,990.94/x
  3. Step 3: Cross multiply
    76,770.86x = 115,156.30 × 29,990.94
  4. Step 4: Simplify right side
    76,770.86x = 3,453,645,683.92
  5. Step 5: Solve for x
    x = 3,453,645,683.92/76,770.86
  6. Step 6: Final answer
    x = 44,986.41

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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.