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Finding the Fourth Proportional to 259,611.80, 389,148.90 and 141,032.60

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Solution

The fourth proportional to 259,611.80, 389,148.90 and 141,032.60 is: 211,402.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,611.80 : 389,148.90 = 141,032.60 : x
  2. Step 2: Convert to fraction form
    259,611.80/389,148.90 = 141,032.60/x
  3. Step 3: Cross multiply
    259,611.80x = 389,148.90 × 141,032.60
  4. Step 4: Simplify right side
    259,611.80x = 54,882,681,154.14
  5. Step 5: Solve for x
    x = 54,882,681,154.14/259,611.80
  6. Step 6: Final answer
    x = 211,402.88

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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.