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Finding the Fourth Proportional to 99,605.80, 149,505.90 and 49,742.20

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Solution

The fourth proportional to 99,605.80, 149,505.90 and 49,742.20 is: 74,661.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,605.80 : 149,505.90 = 49,742.20 : x
  2. Step 2: Convert to fraction form
    99,605.80/149,505.90 = 49,742.20/x
  3. Step 3: Cross multiply
    99,605.80x = 149,505.90 × 49,742.20
  4. Step 4: Simplify right side
    99,605.80x = 7,436,752,378.98
  5. Step 5: Solve for x
    x = 7,436,752,378.98/99,605.80
  6. Step 6: Final answer
    x = 74,661.84

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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.