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Finding the Fourth Proportional to 76,998.60, 115,616.70 and 42,006.60

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Solution

The fourth proportional to 76,998.60, 115,616.70 and 42,006.60 is: 63,074.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,998.60 : 115,616.70 = 42,006.60 : x
  2. Step 2: Convert to fraction form
    76,998.60/115,616.70 = 42,006.60/x
  3. Step 3: Cross multiply
    76,998.60x = 115,616.70 × 42,006.60
  4. Step 4: Simplify right side
    76,998.60x = 4,856,664,470.22
  5. Step 5: Solve for x
    x = 4,856,664,470.22/76,998.60
  6. Step 6: Final answer
    x = 63,074.71

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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.