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Finding the Fourth Proportional to 120,713.60, 181,264.80 and 91,164.80

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Solution

The fourth proportional to 120,713.60, 181,264.80 and 91,164.80 is: 136,894.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,713.60 : 181,264.80 = 91,164.80 : x
  2. Step 2: Convert to fraction form
    120,713.60/181,264.80 = 91,164.80/x
  3. Step 3: Cross multiply
    120,713.60x = 181,264.80 × 91,164.80
  4. Step 4: Simplify right side
    120,713.60x = 16,524,969,239.04
  5. Step 5: Solve for x
    x = 16,524,969,239.04/120,713.60
  6. Step 6: Final answer
    x = 136,894.01

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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.