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Finding the Fourth Proportional to 79,737.12, 118,890.69 and 76,855.80

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Solution

The fourth proportional to 79,737.12, 118,890.69 and 76,855.80 is: 114,594.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,737.12 : 118,890.69 = 76,855.80 : x
  2. Step 2: Convert to fraction form
    79,737.12/118,890.69 = 76,855.80/x
  3. Step 3: Cross multiply
    79,737.12x = 118,890.69 × 76,855.80
  4. Step 4: Simplify right side
    79,737.12x = 9,137,439,092.50
  5. Step 5: Solve for x
    x = 9,137,439,092.50/79,737.12
  6. Step 6: Final answer
    x = 114,594.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.