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Finding the Fourth Proportional to 80,121.40, 120,023.70 and 70,271.80

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Solution

The fourth proportional to 80,121.40, 120,023.70 and 70,271.80 is: 105,268.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,121.40 : 120,023.70 = 70,271.80 : x
  2. Step 2: Convert to fraction form
    80,121.40/120,023.70 = 70,271.80/x
  3. Step 3: Cross multiply
    80,121.40x = 120,023.70 × 70,271.80
  4. Step 4: Simplify right side
    80,121.40x = 8,434,281,441.66
  5. Step 5: Solve for x
    x = 8,434,281,441.66/80,121.40
  6. Step 6: Final answer
    x = 105,268.77

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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.