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Finding the Fourth Proportional to 80,436.80, 120,460.80 and 76,937.60

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Solution

The fourth proportional to 80,436.80, 120,460.80 and 76,937.60 is: 115,220.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,436.80 : 120,460.80 = 76,937.60 : x
  2. Step 2: Convert to fraction form
    80,436.80/120,460.80 = 76,937.60/x
  3. Step 3: Cross multiply
    80,436.80x = 120,460.80 × 76,937.60
  4. Step 4: Simplify right side
    80,436.80x = 9,267,964,846.08
  5. Step 5: Solve for x
    x = 9,267,964,846.08/80,436.80
  6. Step 6: Final answer
    x = 115,220.46

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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.