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Finding the Fourth Proportional to 99,860.20, 149,768.70 and 43,700.20

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Solution

The fourth proportional to 99,860.20, 149,768.70 and 43,700.20 is: 65,540.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,860.20 : 149,768.70 = 43,700.20 : x
  2. Step 2: Convert to fraction form
    99,860.20/149,768.70 = 43,700.20/x
  3. Step 3: Cross multiply
    99,860.20x = 149,768.70 × 43,700.20
  4. Step 4: Simplify right side
    99,860.20x = 6,544,922,143.74
  5. Step 5: Solve for x
    x = 6,544,922,143.74/99,860.20
  6. Step 6: Final answer
    x = 65,540.85

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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.