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Finding the Fourth Proportional to 129,487.85, 194,413.49 and 66,353.33

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Solution

The fourth proportional to 129,487.85, 194,413.49 and 66,353.33 is: 99,623.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,487.85 : 194,413.49 = 66,353.33 : x
  2. Step 2: Convert to fraction form
    129,487.85/194,413.49 = 66,353.33/x
  3. Step 3: Cross multiply
    129,487.85x = 194,413.49 × 66,353.33
  4. Step 4: Simplify right side
    129,487.85x = 12,899,983,110.34
  5. Step 5: Solve for x
    x = 12,899,983,110.34/129,487.85
  6. Step 6: Final answer
    x = 99,623.12

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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.