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Finding the Fourth Proportional to 259,660.40, 389,636.40 and 109,875.20

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Solution

The fourth proportional to 259,660.40, 389,636.40 and 109,875.20 is: 164,874.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,660.40 : 389,636.40 = 109,875.20 : x
  2. Step 2: Convert to fraction form
    259,660.40/389,636.40 = 109,875.20/x
  3. Step 3: Cross multiply
    259,660.40x = 389,636.40 × 109,875.20
  4. Step 4: Simplify right side
    259,660.40x = 42,811,377,377.28
  5. Step 5: Solve for x
    x = 42,811,377,377.28/259,660.40
  6. Step 6: Final answer
    x = 164,874.50

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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.