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Finding the Fourth Proportional to 357,282.60, 535,926.78 and 129,739.08

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Solution

The fourth proportional to 357,282.60, 535,926.78 and 129,739.08 is: 194,609.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,282.60 : 535,926.78 = 129,739.08 : x
  2. Step 2: Convert to fraction form
    357,282.60/535,926.78 = 129,739.08/x
  3. Step 3: Cross multiply
    357,282.60x = 535,926.78 × 129,739.08
  4. Step 4: Simplify right side
    357,282.60x = 69,530,647,384.56
  5. Step 5: Solve for x
    x = 69,530,647,384.56/357,282.60
  6. Step 6: Final answer
    x = 194,609.67

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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.