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Finding the Fourth Proportional to 66,165.46, 99,247.95 and 28,720.64

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Solution

The fourth proportional to 66,165.46, 99,247.95 and 28,720.64 is: 43,080.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,165.46 : 99,247.95 = 28,720.64 : x
  2. Step 2: Convert to fraction form
    66,165.46/99,247.95 = 28,720.64/x
  3. Step 3: Cross multiply
    66,165.46x = 99,247.95 × 28,720.64
  4. Step 4: Simplify right side
    66,165.46x = 2,850,464,890.81
  5. Step 5: Solve for x
    x = 2,850,464,890.81/66,165.46
  6. Step 6: Final answer
    x = 43,080.86

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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.