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Finding the Fourth Proportional to 70,712.80, 106,066.80 and 18,122.80

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Solution

The fourth proportional to 70,712.80, 106,066.80 and 18,122.80 is: 27,183.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,712.80 : 106,066.80 = 18,122.80 : x
  2. Step 2: Convert to fraction form
    70,712.80/106,066.80 = 18,122.80/x
  3. Step 3: Cross multiply
    70,712.80x = 106,066.80 × 18,122.80
  4. Step 4: Simplify right side
    70,712.80x = 1,922,227,403.04
  5. Step 5: Solve for x
    x = 1,922,227,403.04/70,712.80
  6. Step 6: Final answer
    x = 27,183.58

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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.