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Finding the Fourth Proportional to 330,060.30, 495,090.45 and 80,742.30

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Solution

The fourth proportional to 330,060.30, 495,090.45 and 80,742.30 is: 121,113.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,060.30 : 495,090.45 = 80,742.30 : x
  2. Step 2: Convert to fraction form
    330,060.30/495,090.45 = 80,742.30/x
  3. Step 3: Cross multiply
    330,060.30x = 495,090.45 × 80,742.30
  4. Step 4: Simplify right side
    330,060.30x = 39,974,741,641.04
  5. Step 5: Solve for x
    x = 39,974,741,641.04/330,060.30
  6. Step 6: Final answer
    x = 121,113.45

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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.