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Finding the Fourth Proportional to 259,987.92, 389,726.72 and 133,688.67

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Solution

The fourth proportional to 259,987.92, 389,726.72 and 133,688.67 is: 200,401.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,987.92 : 389,726.72 = 133,688.67 : x
  2. Step 2: Convert to fraction form
    259,987.92/389,726.72 = 133,688.67/x
  3. Step 3: Cross multiply
    259,987.92x = 389,726.72 × 133,688.67
  4. Step 4: Simplify right side
    259,987.92x = 52,102,046,860.26
  5. Step 5: Solve for x
    x = 52,102,046,860.26/259,987.92
  6. Step 6: Final answer
    x = 200,401.80

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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.