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Finding the Fourth Proportional to 80,762.60, 121,143.90 and 51,213.80

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Solution

The fourth proportional to 80,762.60, 121,143.90 and 51,213.80 is: 76,820.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,762.60 : 121,143.90 = 51,213.80 : x
  2. Step 2: Convert to fraction form
    80,762.60/121,143.90 = 51,213.80/x
  3. Step 3: Cross multiply
    80,762.60x = 121,143.90 × 51,213.80
  4. Step 4: Simplify right side
    80,762.60x = 6,204,239,465.82
  5. Step 5: Solve for x
    x = 6,204,239,465.82/80,762.60
  6. Step 6: Final answer
    x = 76,820.70

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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.