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Finding the Fourth Proportional to 80,713.80, 121,070.70 and 51,189.30

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Solution

The fourth proportional to 80,713.80, 121,070.70 and 51,189.30 is: 76,783.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,713.80 : 121,070.70 = 51,189.30 : x
  2. Step 2: Convert to fraction form
    80,713.80/121,070.70 = 51,189.30/x
  3. Step 3: Cross multiply
    80,713.80x = 121,070.70 × 51,189.30
  4. Step 4: Simplify right side
    80,713.80x = 6,197,524,383.51
  5. Step 5: Solve for x
    x = 6,197,524,383.51/80,713.80
  6. Step 6: Final answer
    x = 76,783.95

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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.