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Finding the Fourth Proportional to 66,509.65, 99,745.98 and 18,467.20

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Solution

The fourth proportional to 66,509.65, 99,745.98 and 18,467.20 is: 27,695.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,509.65 : 99,745.98 = 18,467.20 : x
  2. Step 2: Convert to fraction form
    66,509.65/99,745.98 = 18,467.20/x
  3. Step 3: Cross multiply
    66,509.65x = 99,745.98 × 18,467.20
  4. Step 4: Simplify right side
    66,509.65x = 1,842,028,961.86
  5. Step 5: Solve for x
    x = 1,842,028,961.86/66,509.65
  6. Step 6: Final answer
    x = 27,695.66

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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.