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Finding the Fourth Proportional to 120,066.80, 179,905.80 and 113,068.40

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Solution

The fourth proportional to 120,066.80, 179,905.80 and 113,068.40 is: 169,419.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,066.80 : 179,905.80 = 113,068.40 : x
  2. Step 2: Convert to fraction form
    120,066.80/179,905.80 = 113,068.40/x
  3. Step 3: Cross multiply
    120,066.80x = 179,905.80 × 113,068.40
  4. Step 4: Simplify right side
    120,066.80x = 20,341,660,956.72
  5. Step 5: Solve for x
    x = 20,341,660,956.72/120,066.80
  6. Step 6: Final answer
    x = 169,419.53

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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.