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Finding the Fourth Proportional to 104,200.80, 156,070.80 and 80,642.40

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Solution

The fourth proportional to 104,200.80, 156,070.80 and 80,642.40 is: 120,785.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,200.80 : 156,070.80 = 80,642.40 : x
  2. Step 2: Convert to fraction form
    104,200.80/156,070.80 = 80,642.40/x
  3. Step 3: Cross multiply
    104,200.80x = 156,070.80 × 80,642.40
  4. Step 4: Simplify right side
    104,200.80x = 12,585,923,881.92
  5. Step 5: Solve for x
    x = 12,585,923,881.92/104,200.80
  6. Step 6: Final answer
    x = 120,785.29

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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.