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Finding the Fourth Proportional to 207,667.20, 311,500.80 and 136,808.40

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Solution

The fourth proportional to 207,667.20, 311,500.80 and 136,808.40 is: 205,212.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,667.20 : 311,500.80 = 136,808.40 : x
  2. Step 2: Convert to fraction form
    207,667.20/311,500.80 = 136,808.40/x
  3. Step 3: Cross multiply
    207,667.20x = 311,500.80 × 136,808.40
  4. Step 4: Simplify right side
    207,667.20x = 42,615,926,046.72
  5. Step 5: Solve for x
    x = 42,615,926,046.72/207,667.20
  6. Step 6: Final answer
    x = 205,212.60

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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.