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Finding the Fourth Proportional to 80,657.80, 120,813.90 and 52,664.20

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Solution

The fourth proportional to 80,657.80, 120,813.90 and 52,664.20 is: 78,883.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,657.80 : 120,813.90 = 52,664.20 : x
  2. Step 2: Convert to fraction form
    80,657.80/120,813.90 = 52,664.20/x
  3. Step 3: Cross multiply
    80,657.80x = 120,813.90 × 52,664.20
  4. Step 4: Simplify right side
    80,657.80x = 6,362,567,392.38
  5. Step 5: Solve for x
    x = 6,362,567,392.38/80,657.80
  6. Step 6: Final answer
    x = 78,883.47

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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.