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Finding the Fourth Proportional to 330,101.20, 495,151.80 and 80,783.20

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Solution

The fourth proportional to 330,101.20, 495,151.80 and 80,783.20 is: 121,174.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,101.20 : 495,151.80 = 80,783.20 : x
  2. Step 2: Convert to fraction form
    330,101.20/495,151.80 = 80,783.20/x
  3. Step 3: Cross multiply
    330,101.20x = 495,151.80 × 80,783.20
  4. Step 4: Simplify right side
    330,101.20x = 39,999,946,889.76
  5. Step 5: Solve for x
    x = 39,999,946,889.76/330,101.20
  6. Step 6: Final answer
    x = 121,174.80

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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.