Home / 81,737.20-122,605.80-70,911.55

Finding the Fourth Proportional to 81,737.20, 122,605.80 and 70,911.55

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Solution

The fourth proportional to 81,737.20, 122,605.80 and 70,911.55 is: 106,367.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,737.20 : 122,605.80 = 70,911.55 : x
  2. Step 2: Convert to fraction form
    81,737.20/122,605.80 = 70,911.55/x
  3. Step 3: Cross multiply
    81,737.20x = 122,605.80 × 70,911.55
  4. Step 4: Simplify right side
    81,737.20x = 8,694,167,316.99
  5. Step 5: Solve for x
    x = 8,694,167,316.99/81,737.20
  6. Step 6: Final answer
    x = 106,367.33

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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.