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Finding the Fourth Proportional to 259,338.58, 389,073.47 and 72,349.94

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Solution

The fourth proportional to 259,338.58, 389,073.47 and 72,349.94 is: 108,543.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,338.58 : 389,073.47 = 72,349.94 : x
  2. Step 2: Convert to fraction form
    259,338.58/389,073.47 = 72,349.94/x
  3. Step 3: Cross multiply
    259,338.58x = 389,073.47 × 72,349.94
  4. Step 4: Simplify right side
    259,338.58x = 28,149,442,210.09
  5. Step 5: Solve for x
    x = 28,149,442,210.09/259,338.58
  6. Step 6: Final answer
    x = 108,543.21

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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.