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Finding the Fourth Proportional to 80,728.24, 120,928.20 and 59,730.88

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Solution

The fourth proportional to 80,728.24, 120,928.20 and 59,730.88 is: 89,474.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,728.24 : 120,928.20 = 59,730.88 : x
  2. Step 2: Convert to fraction form
    80,728.24/120,928.20 = 59,730.88/x
  3. Step 3: Cross multiply
    80,728.24x = 120,928.20 × 59,730.88
  4. Step 4: Simplify right side
    80,728.24x = 7,223,147,802.82
  5. Step 5: Solve for x
    x = 7,223,147,802.82/80,728.24
  6. Step 6: Final answer
    x = 89,474.86

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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.