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Finding the Fourth Proportional to 261,358.41, 391,990.77 and 69,234.11

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Solution

The fourth proportional to 261,358.41, 391,990.77 and 69,234.11 is: 103,838.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,358.41 : 391,990.77 = 69,234.11 : x
  2. Step 2: Convert to fraction form
    261,358.41/391,990.77 = 69,234.11/x
  3. Step 3: Cross multiply
    261,358.41x = 391,990.77 × 69,234.11
  4. Step 4: Simplify right side
    261,358.41x = 27,139,130,129.21
  5. Step 5: Solve for x
    x = 27,139,130,129.21/261,358.41
  6. Step 6: Final answer
    x = 103,838.75

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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.