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Finding the Fourth Proportional to 133,390.60, 199,826.70 and 74,120.20

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Solution

The fourth proportional to 133,390.60, 199,826.70 and 74,120.20 is: 111,036.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,390.60 : 199,826.70 = 74,120.20 : x
  2. Step 2: Convert to fraction form
    133,390.60/199,826.70 = 74,120.20/x
  3. Step 3: Cross multiply
    133,390.60x = 199,826.70 × 74,120.20
  4. Step 4: Simplify right side
    133,390.60x = 14,811,194,969.34
  5. Step 5: Solve for x
    x = 14,811,194,969.34/133,390.60
  6. Step 6: Final answer
    x = 111,036.27

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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.