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Finding the Fourth Proportional to 135,911.40, 203,867.10 and 129,350.40

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Solution

The fourth proportional to 135,911.40, 203,867.10 and 129,350.40 is: 194,025.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,911.40 : 203,867.10 = 129,350.40 : x
  2. Step 2: Convert to fraction form
    135,911.40/203,867.10 = 129,350.40/x
  3. Step 3: Cross multiply
    135,911.40x = 203,867.10 × 129,350.40
  4. Step 4: Simplify right side
    135,911.40x = 26,370,290,931.84
  5. Step 5: Solve for x
    x = 26,370,290,931.84/135,911.40
  6. Step 6: Final answer
    x = 194,025.60

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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.