Home / 66,121.80-99,189.24-21,730.56

Finding the Fourth Proportional to 66,121.80, 99,189.24 and 21,730.56

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Solution

The fourth proportional to 66,121.80, 99,189.24 and 21,730.56 is: 32,597.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,121.80 : 99,189.24 = 21,730.56 : x
  2. Step 2: Convert to fraction form
    66,121.80/99,189.24 = 21,730.56/x
  3. Step 3: Cross multiply
    66,121.80x = 99,189.24 × 21,730.56
  4. Step 4: Simplify right side
    66,121.80x = 2,155,437,731.17
  5. Step 5: Solve for x
    x = 2,155,437,731.17/66,121.80
  6. Step 6: Final answer
    x = 32,597.99

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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.