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Finding the Fourth Proportional to 120,703.20, 181,249.20 and 81,434.40

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Solution

The fourth proportional to 120,703.20, 181,249.20 and 81,434.40 is: 122,282.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,703.20 : 181,249.20 = 81,434.40 : x
  2. Step 2: Convert to fraction form
    120,703.20/181,249.20 = 81,434.40/x
  3. Step 3: Cross multiply
    120,703.20x = 181,249.20 × 81,434.40
  4. Step 4: Simplify right side
    120,703.20x = 14,759,919,852.48
  5. Step 5: Solve for x
    x = 14,759,919,852.48/120,703.20
  6. Step 6: Final answer
    x = 122,282.76

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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.