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Finding the Fourth Proportional to 130,039.70, 195,059.55 and 100,515.20

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Solution

The fourth proportional to 130,039.70, 195,059.55 and 100,515.20 is: 150,772.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,039.70 : 195,059.55 = 100,515.20 : x
  2. Step 2: Convert to fraction form
    130,039.70/195,059.55 = 100,515.20/x
  3. Step 3: Cross multiply
    130,039.70x = 195,059.55 × 100,515.20
  4. Step 4: Simplify right side
    130,039.70x = 19,606,449,680.16
  5. Step 5: Solve for x
    x = 19,606,449,680.16/130,039.70
  6. Step 6: Final answer
    x = 150,772.80

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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.