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Finding the Fourth Proportional to 80,655.96, 120,983.54 and 20,684.18

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Solution

The fourth proportional to 80,655.96, 120,983.54 and 20,684.18 is: 31,026.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,655.96 : 120,983.54 = 20,684.18 : x
  2. Step 2: Convert to fraction form
    80,655.96/120,983.54 = 20,684.18/x
  3. Step 3: Cross multiply
    80,655.96x = 120,983.54 × 20,684.18
  4. Step 4: Simplify right side
    80,655.96x = 2,502,444,610.06
  5. Step 5: Solve for x
    x = 2,502,444,610.06/80,655.96
  6. Step 6: Final answer
    x = 31,026.16

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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.