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Finding the Fourth Proportional to 249,879.84, 374,819.45 and 81,399.89

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Solution

The fourth proportional to 249,879.84, 374,819.45 and 81,399.89 is: 122,099.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,879.84 : 374,819.45 = 81,399.89 : x
  2. Step 2: Convert to fraction form
    249,879.84/374,819.45 = 81,399.89/x
  3. Step 3: Cross multiply
    249,879.84x = 374,819.45 × 81,399.89
  4. Step 4: Simplify right side
    249,879.84x = 30,510,260,879.42
  5. Step 5: Solve for x
    x = 30,510,260,879.42/249,879.84
  6. Step 6: Final answer
    x = 122,099.73

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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.