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Finding the Fourth Proportional to 272,611.71, 408,651.78 and 130,419.87

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Solution

The fourth proportional to 272,611.71, 408,651.78 and 130,419.87 is: 195,502.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,611.71 : 408,651.78 = 130,419.87 : x
  2. Step 2: Convert to fraction form
    272,611.71/408,651.78 = 130,419.87/x
  3. Step 3: Cross multiply
    272,611.71x = 408,651.78 × 130,419.87
  4. Step 4: Simplify right side
    272,611.71x = 53,296,312,022.87
  5. Step 5: Solve for x
    x = 53,296,312,022.87/272,611.71
  6. Step 6: Final answer
    x = 195,502.65

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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.