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Finding the Fourth Proportional to 99,694.80, 149,568.60 and 43,510.80

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Solution

The fourth proportional to 99,694.80, 149,568.60 and 43,510.80 is: 65,277.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,694.80 : 149,568.60 = 43,510.80 : x
  2. Step 2: Convert to fraction form
    99,694.80/149,568.60 = 43,510.80/x
  3. Step 3: Cross multiply
    99,694.80x = 149,568.60 × 43,510.80
  4. Step 4: Simplify right side
    99,694.80x = 6,507,849,440.88
  5. Step 5: Solve for x
    x = 6,507,849,440.88/99,694.80
  6. Step 6: Final answer
    x = 65,277.72

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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.