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Finding the Fourth Proportional to 330,129.60, 495,136.80 and 119,659.20

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Solution

The fourth proportional to 330,129.60, 495,136.80 and 119,659.20 is: 179,467.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,129.60 : 495,136.80 = 119,659.20 : x
  2. Step 2: Convert to fraction form
    330,129.60/495,136.80 = 119,659.20/x
  3. Step 3: Cross multiply
    330,129.60x = 495,136.80 × 119,659.20
  4. Step 4: Simplify right side
    330,129.60x = 59,247,673,378.56
  5. Step 5: Solve for x
    x = 59,247,673,378.56/330,129.60
  6. Step 6: Final answer
    x = 179,467.92

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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.