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Finding the Fourth Proportional to 129,861.60, 194,792.40 and 124,612.80

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Solution

The fourth proportional to 129,861.60, 194,792.40 and 124,612.80 is: 186,919.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,861.60 : 194,792.40 = 124,612.80 : x
  2. Step 2: Convert to fraction form
    129,861.60/194,792.40 = 124,612.80/x
  3. Step 3: Cross multiply
    129,861.60x = 194,792.40 × 124,612.80
  4. Step 4: Simplify right side
    129,861.60x = 24,273,626,382.72
  5. Step 5: Solve for x
    x = 24,273,626,382.72/129,861.60
  6. Step 6: Final answer
    x = 186,919.20

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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.