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Finding the Fourth Proportional to 131,180.40, 196,916.40 and 81,316.80

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Solution

The fourth proportional to 131,180.40, 196,916.40 and 81,316.80 is: 122,065.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,180.40 : 196,916.40 = 81,316.80 : x
  2. Step 2: Convert to fraction form
    131,180.40/196,916.40 = 81,316.80/x
  3. Step 3: Cross multiply
    131,180.40x = 196,916.40 × 81,316.80
  4. Step 4: Simplify right side
    131,180.40x = 16,012,611,515.52
  5. Step 5: Solve for x
    x = 16,012,611,515.52/131,180.40
  6. Step 6: Final answer
    x = 122,065.58

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1.5x scale

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.