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Finding the Fourth Proportional to 80,762.60, 120,998.10 and 75,513.80

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Solution

The fourth proportional to 80,762.60, 120,998.10 and 75,513.80 is: 113,134.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,762.60 : 120,998.10 = 75,513.80 : x
  2. Step 2: Convert to fraction form
    80,762.60/120,998.10 = 75,513.80/x
  3. Step 3: Cross multiply
    80,762.60x = 120,998.10 × 75,513.80
  4. Step 4: Simplify right side
    80,762.60x = 9,137,026,323.78
  5. Step 5: Solve for x
    x = 9,137,026,323.78/80,762.60
  6. Step 6: Final answer
    x = 113,134.38

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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.