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Finding the Fourth Proportional to 80,641.46, 120,964.92 and 28,051.40

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Solution

The fourth proportional to 80,641.46, 120,964.92 and 28,051.40 is: 42,078.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,641.46 : 120,964.92 = 28,051.40 : x
  2. Step 2: Convert to fraction form
    80,641.46/120,964.92 = 28,051.40/x
  3. Step 3: Cross multiply
    80,641.46x = 120,964.92 × 28,051.40
  4. Step 4: Simplify right side
    80,641.46x = 3,393,235,356.89
  5. Step 5: Solve for x
    x = 3,393,235,356.89/80,641.46
  6. Step 6: Final answer
    x = 42,078.05

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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.