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Finding the Fourth Proportional to 139,391.84, 209,122.96 and 60,486.88

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Solution

The fourth proportional to 139,391.84, 209,122.96 and 60,486.88 is: 90,745.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,391.84 : 209,122.96 = 60,486.88 : x
  2. Step 2: Convert to fraction form
    139,391.84/209,122.96 = 60,486.88/x
  3. Step 3: Cross multiply
    139,391.84x = 209,122.96 × 60,486.88
  4. Step 4: Simplify right side
    139,391.84x = 12,649,195,386.76
  5. Step 5: Solve for x
    x = 12,649,195,386.76/139,391.84
  6. Step 6: Final answer
    x = 90,745.59

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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.