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Finding the Fourth Proportional to 129,989.76, 195,008.88 and 41,219.40

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Solution

The fourth proportional to 129,989.76, 195,008.88 and 41,219.40 is: 61,836.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,989.76 : 195,008.88 = 41,219.40 : x
  2. Step 2: Convert to fraction form
    129,989.76/195,008.88 = 41,219.40/x
  3. Step 3: Cross multiply
    129,989.76x = 195,008.88 × 41,219.40
  4. Step 4: Simplify right side
    129,989.76x = 8,038,149,028.27
  5. Step 5: Solve for x
    x = 8,038,149,028.27/129,989.76
  6. Step 6: Final answer
    x = 61,836.79

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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.