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Finding the Fourth Proportional to 67,120.20, 100,712.70 and 47,356.20

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Solution

The fourth proportional to 67,120.20, 100,712.70 and 47,356.20 is: 71,057.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,120.20 : 100,712.70 = 47,356.20 : x
  2. Step 2: Convert to fraction form
    67,120.20/100,712.70 = 47,356.20/x
  3. Step 3: Cross multiply
    67,120.20x = 100,712.70 × 47,356.20
  4. Step 4: Simplify right side
    67,120.20x = 4,769,370,763.74
  5. Step 5: Solve for x
    x = 4,769,370,763.74/67,120.20
  6. Step 6: Final answer
    x = 71,057.16

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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.