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Finding the Fourth Proportional to 126,603.80, 189,905.70 and 79,364.60

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Solution

The fourth proportional to 126,603.80, 189,905.70 and 79,364.60 is: 119,046.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,603.80 : 189,905.70 = 79,364.60 : x
  2. Step 2: Convert to fraction form
    126,603.80/189,905.70 = 79,364.60/x
  3. Step 3: Cross multiply
    126,603.80x = 189,905.70 × 79,364.60
  4. Step 4: Simplify right side
    126,603.80x = 15,071,789,918.22
  5. Step 5: Solve for x
    x = 15,071,789,918.22/126,603.80
  6. Step 6: Final answer
    x = 119,046.90

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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.