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Finding the Fourth Proportional to 80,458.70, 120,698.65 and 29,850.84

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Solution

The fourth proportional to 80,458.70, 120,698.65 and 29,850.84 is: 44,780.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,458.70 : 120,698.65 = 29,850.84 : x
  2. Step 2: Convert to fraction form
    80,458.70/120,698.65 = 29,850.84/x
  3. Step 3: Cross multiply
    80,458.70x = 120,698.65 × 29,850.84
  4. Step 4: Simplify right side
    80,458.70x = 3,602,956,275.42
  5. Step 5: Solve for x
    x = 3,602,956,275.42/80,458.70
  6. Step 6: Final answer
    x = 44,780.19

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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.